diff --git a/src/app/issues/issue-detail/issue-detail.css b/src/app/issues/issue-detail/issue-detail.css
index bdd9d8c..27ef477 100644
--- a/src/app/issues/issue-detail/issue-detail.css
+++ b/src/app/issues/issue-detail/issue-detail.css
@@ -138,6 +138,23 @@
 }
 
 /* Description */
+.description-action-btn {
+  border: none;
+  background: none;
+  font-size: 0.75rem;
+  font-weight: 400;
+  text-transform: none;
+  letter-spacing: normal;
+  color: #6b7280;
+  cursor: pointer;
+  padding: 0;
+}
+
+.description-action-btn:hover {
+  color: #111827;
+  text-decoration: underline;
+}
+
 .description-textarea {
   min-height: 40rem;
   resize: vertical;
@@ -145,7 +162,6 @@
 
 .description-preview {
   min-height: 7rem;
-  white-space: pre-wrap;
   font-size: 0.9rem;
   color: #374151;
   cursor: text;
diff --git a/src/app/issues/issue-detail/issue-detail.html b/src/app/issues/issue-detail/issue-detail.html
index 97a9f80..34eabad 100644
--- a/src/app/issues/issue-detail/issue-detail.html
+++ b/src/app/issues/issue-detail/issue-detail.html
@@ -176,7 +176,12 @@
 
 <!-- Description -->
 <div class="card shadow-sm mb-3">
-  <div class="card-header section-header">Description</div>
+  <div class="card-header section-header d-flex align-items-center justify-content-between">
+    <span>Description</span>
+    @if (!editingDescription) {
+      <button type="button" class="description-action-btn" (click)="startEditDescription()">Modifier</button>
+    }
+  </div>
   <div class="card-body">
     @if (editingDescription) {
       <textarea
@@ -184,13 +189,17 @@
         class="form-control border-0 shadow-none p-0 description-textarea"
         placeholder="Ajouter une description..."
         [(ngModel)]="issue.description"
-        (blur)="editingDescription = false; saveIssue()"
+        (keydown.escape)="cancelEditDescription()"
         (paste)="onDescriptionPaste($event)"
       ></textarea>
+      <div class="d-flex gap-2 mt-2">
+        <button type="button" class="btn btn-sm btn-primary" (click)="saveDescription()">Enregistrer</button>
+        <button type="button" class="btn btn-sm btn-outline-secondary" (click)="cancelEditDescription()">Annuler</button>
+      </div>
     } @else {
       <div
         class="description-preview"
-        (click)="editingDescription = true"
+        (click)="startEditDescription()"
         title="Cliquer pour éditer"
       >
         @if (issue.description) {
diff --git a/src/app/issues/issue-detail/issue-detail.spec.ts b/src/app/issues/issue-detail/issue-detail.spec.ts
index fecb909..ada3755 100644
--- a/src/app/issues/issue-detail/issue-detail.spec.ts
+++ b/src/app/issues/issue-detail/issue-detail.spec.ts
@@ -519,6 +519,32 @@ describe('IssueDetail — existing issue', () => {
     });
   });
 
+  describe('description edit flow', () => {
+    it('startEditDescription sets editingDescription to true and stores original text', () => {
+      (component as any).issue.description = 'original';
+      (component as any).startEditDescription();
+      expect((component as any).editingDescription).toBe(true);
+      expect((component as any)._descriptionBeforeEdit).toBe('original');
+    });
+
+    it('saveDescription exits edit mode and persists the description', async () => {
+      (component as any).issue.description = 'updated';
+      (component as any).editingDescription = true;
+      await (component as any).saveDescription();
+      expect((component as any).editingDescription).toBe(false);
+      expect(store.getById(1)?.description).toBe('updated');
+    });
+
+    it('cancelEditDescription restores the original description and exits edit mode', () => {
+      (component as any).issue.description = 'original';
+      (component as any).startEditDescription();
+      (component as any).issue.description = 'changed mid-edit';
+      (component as any).cancelEditDescription();
+      expect((component as any).issue.description).toBe('original');
+      expect((component as any).editingDescription).toBe(false);
+    });
+  });
+
   describe('onDescriptionPaste', () => {
     afterEach(() => vi.unstubAllGlobals());
 
diff --git a/src/app/issues/issue-detail/issue-detail.ts b/src/app/issues/issue-detail/issue-detail.ts
index 5cb7f83..96e98c1 100644
--- a/src/app/issues/issue-detail/issue-detail.ts
+++ b/src/app/issues/issue-detail/issue-detail.ts
@@ -58,6 +58,7 @@ export class IssueDetail {
   protected showAddDependency = false;
   protected selectedCandidateId: number | null = null;
   protected editingDescription = false;
+  private _descriptionBeforeEdit = '';
   protected showAddToEpic = false;
   protected selectedEpicCandidateId: number | null = null;
   protected showCreateInEpic = false;
@@ -237,6 +238,21 @@ export class IssueDetail {
     return !!this.issue.epic;
   }
 
+  protected startEditDescription(): void {
+    this._descriptionBeforeEdit = this.issue.description;
+    this.editingDescription = true;
+  }
+
+  protected async saveDescription(): Promise<void> {
+    this.editingDescription = false;
+    await this.saveIssue();
+  }
+
+  protected cancelEditDescription(): void {
+    this.issue.description = this._descriptionBeforeEdit;
+    this.editingDescription = false;
+  }
+
   protected onDescriptionPaste(event: ClipboardEvent): void {
     const ta = event.target as HTMLTextAreaElement;
     const start = ta.selectionStart;