diff --git a/loko/interventions/static/interventions/calendar/interventions_calendar.js b/loko/interventions/static/interventions/calendar/interventions_calendar.js
index 05c417b..db93f3b 100644
--- a/loko/interventions/static/interventions/calendar/interventions_calendar.js
+++ b/loko/interventions/static/interventions/calendar/interventions_calendar.js
@@ -5220,7 +5220,12 @@ function openMemberHistoryModal(memberId) {
     
     if (spinner) spinner.classList.remove('d-none');
     if (content) content.classList.add('d-none');
-    
+
+    const teamModalEl = document.getElementById('teamDailyMembersModal');
+    if (teamModalEl && teamModalEl.classList.contains('show')) {
+        modalEl.style.zIndex = '1070';
+    }
+
     modal.show();
     
     fetch(`/interventions/calendar/member/${memberId}/history/`, {
@@ -5622,7 +5627,30 @@ document.addEventListener('click', function(e) {
 
 const _memberHistoryModalEl = document.getElementById('memberHistoryModal');
 if (_memberHistoryModalEl) {
+    function ensureHistoryModalOnTop() {
+        const teamModalEl = document.getElementById('teamDailyMembersModal');
+        if (teamModalEl && teamModalEl.classList.contains('show')) {
+            _memberHistoryModalEl.style.zIndex = '1070';
+            const backdrops = document.querySelectorAll('.modal-backdrop');
+            if (backdrops.length > 1) {
+                backdrops[backdrops.length - 1].classList.add('member-history-backdrop');
+                backdrops[backdrops.length - 1].style.zIndex = '1065';
+            }
+        }
+    }
+
+    _memberHistoryModalEl.addEventListener('show.bs.modal', function () {
+        ensureHistoryModalOnTop();
+        setTimeout(ensureHistoryModalOnTop, 0);
+        setTimeout(ensureHistoryModalOnTop, 50);
+    });
+
+    _memberHistoryModalEl.addEventListener('shown.bs.modal', function () {
+        ensureHistoryModalOnTop();
+    });
+
     _memberHistoryModalEl.addEventListener('hidden.bs.modal', function () {
+        _memberHistoryModalEl.style.zIndex = '';
         const teamModalEl = document.getElementById('teamDailyMembersModal');
         if (teamModalEl && teamModalEl.classList.contains('show')) {
             document.body.classList.add('modal-open');
diff --git a/loko/interventions/templates/interventions/interventions_calendar.html b/loko/interventions/templates/interventions/interventions_calendar.html
index e096fb1..290a584 100644
--- a/loko/interventions/templates/interventions/interventions_calendar.html
+++ b/loko/interventions/templates/interventions/interventions_calendar.html
@@ -234,6 +234,14 @@
             border-color: #6c757d !important;
             color: white !important;
         }
+
+        /* Ensure member history modal displays on top of other modals */
+        #memberHistoryModal {
+            z-index: 1070 !important;
+        }
+        .modal-backdrop.member-history-backdrop {
+            z-index: 1065 !important;
+        }
     </style>
 {% endblock head %}
 
@@ -650,6 +658,93 @@
         </div>
     </div>
 
+    <!-- Modal Bootstrap pour la modification de l'équipe pour un jour donné -->
+    <div class="modal fade" id="teamDailyMembersModal" tabindex="-1" aria-labelledby="teamDailyMembersModalLabel" aria-hidden="true">
+        <div class="modal-dialog modal-dialog-centered modal-lg">
+            <div class="modal-content">
+                <div class="modal-header">
+                    <h5 class="modal-title d-flex align-items-center gap-2" id="teamDailyMembersModalLabel">
+                        <i class="bi bi-people-fill text-primary"></i>
+                        <span id="team-daily-modal-title">{% translate "Composition de l'équipe" %}</span>
+                    </h5>
+                    <button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="{% translate 'Fermer' %}"></button>
+                </div>
+                <div class="modal-body">
+                    <div id="team-daily-modal-spinner" class="text-center py-4">
+                        <div class="spinner-border text-primary" role="status">
+                            <span class="visually-hidden">{% translate "Chargement..." %}</span>
+                        </div>
+                    </div>
+                    <div id="team-daily-modal-content" class="d-none">
+                        <!-- En-tête d'information -->
+                        <div class="d-flex align-items-center justify-content-between p-2 mb-3 bg-light rounded border">
+                            <div>
+                                <span class="fw-bold text-dark fs-6" id="team-daily-modal-team-name"></span>
+                                <span class="badge bg-secondary-subtle text-secondary border ms-2" id="team-daily-modal-company"></span>
+                            </div>
+                            <div class="text-muted small fw-semibold" id="team-daily-modal-date-display"></div>
+                        </div>
+
+                        <!-- Alertes lecture seule -->
+                        <div class="alert alert-warning py-2 small d-none" id="team-daily-past-alert">
+                            <i class="bi bi-exclamation-triangle-fill me-1"></i>
+                            {% translate "Cette date est passée. La composition de l'équipe ne peut plus être modifiée." %}
+                        </div>
+                        <div class="alert alert-info py-2 small d-none" id="team-daily-readonly-alert">
+                            <i class="bi bi-info-circle-fill me-1"></i>
+                            {% translate "Vous n'avez pas les droits de modification sur cette équipe." %}
+                        </div>
+
+                        <!-- Feedback messages -->
+                        <div class="alert alert-danger py-2 small d-none" id="team-daily-error-alert"></div>
+                        <div class="alert alert-success py-2 small d-none" id="team-daily-success-alert"></div>
+
+                        <!-- Liste des membres actuels -->
+                        <div class="mb-4">
+                            <h6 class="fw-semibold text-secondary mb-2 d-flex align-items-center gap-2">
+                                <i class="bi bi-person-check-fill text-success"></i>
+                                {% translate "Membres de l'équipe pour ce jour" %}
+                                <span class="badge bg-secondary rounded-pill ms-1" id="team-daily-members-count">0</span>
+                            </h6>
+                            <div id="team-daily-members-list" class="list-group list-group-flush border rounded">
+                                <!-- Injecté par JS -->
+                            </div>
+                            <div id="team-daily-empty-members" class="text-center text-muted py-3 border rounded bg-light d-none">
+                                <i class="bi bi-people fs-4 d-block mb-1 text-secondary"></i>
+                                {% translate "Aucun membre affecté à cette équipe ce jour-là." %}
+                            </div>
+                        </div>
+
+                        <!-- Formulaire d'ajout de membre -->
+                        <div id="team-daily-add-section" class="card border bg-light-subtle d-none">
+                            <div class="card-body p-3">
+                                <h6 class="fw-semibold text-dark mb-2">
+                                    <i class="bi bi-person-plus-fill text-primary me-1"></i>
+                                    {% translate "Ajouter un membre pour ce jour" %}
+                                </h6>
+                                <div class="row g-2 align-items-center">
+                                    <div class="col-sm-8">
+                                        <select class="form-select form-select-sm" id="team-daily-candidate-select">
+                                            <option value="">{% translate "Sélectionner un membre..." %}</option>
+                                        </select>
+                                    </div>
+                                    <div class="col-sm-4 d-grid">
+                                        <button type="button" class="btn btn-sm btn-primary" id="btn-team-daily-add-member">
+                                            <i class="bi bi-plus-lg me-1"></i>{% translate "Ajouter" %}
+                                        </button>
+                                    </div>
+                                </div>
+                            </div>
+                        </div>
+                    </div>
+                </div>
+                <div class="modal-footer">
+                    <button type="button" class="btn btn-secondary" data-bs-dismiss="modal">{% translate "Fermer" %}</button>
+                </div>
+            </div>
+        </div>
+    </div>
+
     <!-- Modal Bootstrap pour l'historique d'un membre -->
     <div class="modal fade" id="memberHistoryModal" tabindex="-1" aria-labelledby="memberHistoryModalLabel" aria-hidden="true">
         <div class="modal-dialog modal-dialog-centered modal-xl">
@@ -745,93 +840,6 @@
         </div>
     </div>
 
-    <!-- Modal Bootstrap pour la modification de l'équipe pour un jour donné -->
-    <div class="modal fade" id="teamDailyMembersModal" tabindex="-1" aria-labelledby="teamDailyMembersModalLabel" aria-hidden="true">
-        <div class="modal-dialog modal-dialog-centered modal-lg">
-            <div class="modal-content">
-                <div class="modal-header">
-                    <h5 class="modal-title d-flex align-items-center gap-2" id="teamDailyMembersModalLabel">
-                        <i class="bi bi-people-fill text-primary"></i>
-                        <span id="team-daily-modal-title">{% translate "Composition de l'équipe" %}</span>
-                    </h5>
-                    <button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="{% translate 'Fermer' %}"></button>
-                </div>
-                <div class="modal-body">
-                    <div id="team-daily-modal-spinner" class="text-center py-4">
-                        <div class="spinner-border text-primary" role="status">
-                            <span class="visually-hidden">{% translate "Chargement..." %}</span>
-                        </div>
-                    </div>
-                    <div id="team-daily-modal-content" class="d-none">
-                        <!-- En-tête d'information -->
-                        <div class="d-flex align-items-center justify-content-between p-2 mb-3 bg-light rounded border">
-                            <div>
-                                <span class="fw-bold text-dark fs-6" id="team-daily-modal-team-name"></span>
-                                <span class="badge bg-secondary-subtle text-secondary border ms-2" id="team-daily-modal-company"></span>
-                            </div>
-                            <div class="text-muted small fw-semibold" id="team-daily-modal-date-display"></div>
-                        </div>
-
-                        <!-- Alertes lecture seule -->
-                        <div class="alert alert-warning py-2 small d-none" id="team-daily-past-alert">
-                            <i class="bi bi-exclamation-triangle-fill me-1"></i>
-                            {% translate "Cette date est passée. La composition de l'équipe ne peut plus être modifiée." %}
-                        </div>
-                        <div class="alert alert-info py-2 small d-none" id="team-daily-readonly-alert">
-                            <i class="bi bi-info-circle-fill me-1"></i>
-                            {% translate "Vous n'avez pas les droits de modification sur cette équipe." %}
-                        </div>
-
-                        <!-- Feedback messages -->
-                        <div class="alert alert-danger py-2 small d-none" id="team-daily-error-alert"></div>
-                        <div class="alert alert-success py-2 small d-none" id="team-daily-success-alert"></div>
-
-                        <!-- Liste des membres actuels -->
-                        <div class="mb-4">
-                            <h6 class="fw-semibold text-secondary mb-2 d-flex align-items-center gap-2">
-                                <i class="bi bi-person-check-fill text-success"></i>
-                                {% translate "Membres de l'équipe pour ce jour" %}
-                                <span class="badge bg-secondary rounded-pill ms-1" id="team-daily-members-count">0</span>
-                            </h6>
-                            <div id="team-daily-members-list" class="list-group list-group-flush border rounded">
-                                <!-- Injecté par JS -->
-                            </div>
-                            <div id="team-daily-empty-members" class="text-center text-muted py-3 border rounded bg-light d-none">
-                                <i class="bi bi-people fs-4 d-block mb-1 text-secondary"></i>
-                                {% translate "Aucun membre affecté à cette équipe ce jour-là." %}
-                            </div>
-                        </div>
-
-                        <!-- Formulaire d'ajout de membre -->
-                        <div id="team-daily-add-section" class="card border bg-light-subtle d-none">
-                            <div class="card-body p-3">
-                                <h6 class="fw-semibold text-dark mb-2">
-                                    <i class="bi bi-person-plus-fill text-primary me-1"></i>
-                                    {% translate "Ajouter un membre pour ce jour" %}
-                                </h6>
-                                <div class="row g-2 align-items-center">
-                                    <div class="col-sm-8">
-                                        <select class="form-select form-select-sm" id="team-daily-candidate-select">
-                                            <option value="">{% translate "Sélectionner un membre..." %}</option>
-                                        </select>
-                                    </div>
-                                    <div class="col-sm-4 d-grid">
-                                        <button type="button" class="btn btn-sm btn-primary" id="btn-team-daily-add-member">
-                                            <i class="bi bi-plus-lg me-1"></i>{% translate "Ajouter" %}
-                                        </button>
-                                    </div>
-                                </div>
-                            </div>
-                        </div>
-                    </div>
-                </div>
-                <div class="modal-footer">
-                    <button type="button" class="btn btn-secondary" data-bs-dismiss="modal">{% translate "Fermer" %}</button>
-                </div>
-            </div>
-        </div>
-    </div>
-
 {% endblock content%}
 
 {% block script %}