diff --git a/.playground/pages/composant/selectCheckbox.vue b/.playground/pages/composant/selectCheckbox.vue
index cc1df30..4764d96 100644
--- a/.playground/pages/composant/selectCheckbox.vue
+++ b/.playground/pages/composant/selectCheckbox.vue
@@ -100,6 +100,29 @@
       />
     </div>
 
+    <div class="rounded-lg border p-4">
+      <h2 class="mb-4 text-xl font-bold">Tout sélectionner</h2>
+      <MalioSelectCheckbox
+        v-model="selectAllValue"
+        :options="options"
+        label="Pays"
+        :display-select-all="true"
+        empty-option-label="Aucune selection"
+      />
+    </div>
+
+    <div class="rounded-lg border p-4">
+      <h2 class="mb-4 text-xl font-bold">Tout sélectionner (label custom)</h2>
+      <MalioSelectCheckbox
+        v-model="selectAllCustomValue"
+        :options="options"
+        label="Pays"
+        :display-select-all="true"
+        select-all-label="Cocher tout"
+        empty-option-label="Aucune selection"
+      />
+    </div>
+
     <div class="rounded-lg border p-4 md:col-span-2">
       <h2 class="mb-4 text-xl font-bold">Liste longue</h2>
       <MalioSelectCheckbox
@@ -163,6 +186,8 @@ const errorValue = ref<Array<string | number>>([])
 const successValue = ref<Array<string | number>>(['be'])
 const disabledValue = ref<Array<string | number>>(['ca'])
 const emptyValue = ref<Array<string | number>>([])
+const selectAllValue = ref<Array<string | number>>([])
+const selectAllCustomValue = ref<Array<string | number>>([])
 const longListValue = ref<Array<string | number>>([])
 const bottomValue = ref<Array<string | number>>([])
 </script>
diff --git a/app/components/malio/SelectCheckbox.test.ts b/app/components/malio/SelectCheckbox.test.ts
index 0092f16..8b87322 100644
--- a/app/components/malio/SelectCheckbox.test.ts
+++ b/app/components/malio/SelectCheckbox.test.ts
@@ -23,6 +23,8 @@ type SelectCheckboxProps = {
   textLabel?: string
   rounded?: string
   displayTag?: boolean
+  displaySelectAll?: boolean
+  selectAllLabel?: string
   disabled?: boolean
 }
 
@@ -92,4 +94,85 @@ describe('MalioSelectCheckbox', () => {
     expect(wrapper.text()).not.toContain('0/3')
     expect(wrapper.text()).toContain('Aucune selection')
   })
+
+  it('does not show select all checkbox by default', async () => {
+    const wrapper = mount(SelectCheckboxForTest, {
+      props: {modelValue: [], options},
+    })
+
+    await wrapper.get('button').trigger('click')
+
+    const checkboxes = wrapper.findAll('input[type="checkbox"]')
+    expect(checkboxes).toHaveLength(options.length)
+  })
+
+  it('shows select all checkbox when displaySelectAll is true', async () => {
+    const wrapper = mount(SelectCheckboxForTest, {
+      props: {modelValue: [], options, displaySelectAll: true},
+    })
+
+    await wrapper.get('button').trigger('click')
+
+    const checkboxes = wrapper.findAll('input[type="checkbox"]')
+    expect(checkboxes).toHaveLength(options.length + 1)
+    expect(wrapper.text()).toContain('Tout sélectionner')
+  })
+
+  it('shows custom select all label', async () => {
+    const wrapper = mount(SelectCheckboxForTest, {
+      props: {modelValue: [], options, displaySelectAll: true, selectAllLabel: 'Sélectionner tout'},
+    })
+
+    await wrapper.get('button').trigger('click')
+
+    expect(wrapper.text()).toContain('Sélectionner tout')
+  })
+
+  it('emits all values when select all is clicked and none selected', async () => {
+    const wrapper = mount(SelectCheckboxForTest, {
+      props: {modelValue: [], options, displaySelectAll: true},
+    })
+
+    await wrapper.get('button').trigger('click')
+
+    const checkboxes = wrapper.findAll('input[type="checkbox"]')
+    await checkboxes[0].setValue(true)
+
+    expect(wrapper.emitted('update:modelValue')?.[0]).toEqual([['fr', 'be', 'ca']])
+  })
+
+  it('emits empty array when select all is clicked and all selected', async () => {
+    const wrapper = mount(SelectCheckboxForTest, {
+      props: {modelValue: ['fr', 'be', 'ca'], options, displaySelectAll: true},
+    })
+
+    await wrapper.get('button').trigger('click')
+
+    const checkboxes = wrapper.findAll('input[type="checkbox"]')
+    await checkboxes[0].setValue(false)
+
+    expect(wrapper.emitted('update:modelValue')?.[0]).toEqual([[]])
+  })
+
+  it('select all checkbox is checked when all options are selected', async () => {
+    const wrapper = mount(SelectCheckboxForTest, {
+      props: {modelValue: ['fr', 'be', 'ca'], options, displaySelectAll: true},
+    })
+
+    await wrapper.get('button').trigger('click')
+
+    const checkboxes = wrapper.findAll('input[type="checkbox"]')
+    expect((checkboxes[0].element as HTMLInputElement).checked).toBe(true)
+  })
+
+  it('select all checkbox is unchecked when not all options are selected', async () => {
+    const wrapper = mount(SelectCheckboxForTest, {
+      props: {modelValue: ['fr'], options, displaySelectAll: true},
+    })
+
+    await wrapper.get('button').trigger('click')
+
+    const checkboxes = wrapper.findAll('input[type="checkbox"]')
+    expect((checkboxes[0].element as HTMLInputElement).checked).toBe(false)
+  })
 })
diff --git a/app/components/malio/SelectCheckbox.vue b/app/components/malio/SelectCheckbox.vue
index 7778882..bb3547d 100644
--- a/app/components/malio/SelectCheckbox.vue
+++ b/app/components/malio/SelectCheckbox.vue
@@ -143,6 +143,21 @@
             : 'border-m-primary'
       ]"
     >
+      <li
+        v-if="displaySelectAll"
+        class="border-b border-m-muted/30 px-3 py-2"
+        @mousedown.prevent
+      >
+        <Checkbox
+          :model-value="allSelected"
+          :label="selectAllLabel"
+          :disabled="disabled"
+          group-class="!mt-0"
+          label-class="option-checkbox w-full cursor-pointer font-semibold"
+          tabindex="-1"
+          @update:model-value="toggleAll"
+        />
+      </li>
       <li
         v-for="(opt, index) in normalizedOptions"
         :id="optionId(index)"
@@ -212,6 +227,8 @@ const props = withDefaults(defineProps<{
   textLabel?: string
   rounded?: string
   displayTag?: boolean
+  displaySelectAll?: boolean
+  selectAllLabel?: string
   disabled?: boolean
 }>(), {
   options: () => [],
@@ -227,6 +244,8 @@ const props = withDefaults(defineProps<{
   textLabel: 'text-sm',
   rounded: 'rounded-md',
   displayTag: false,
+  displaySelectAll: false,
+  selectAllLabel: 'Tout sélectionner',
   disabled: false,
 })
 
@@ -330,6 +349,19 @@ function toggle() {
   open()
 }
 
+const allSelected = computed(() =>
+  normalizedOptions.value.length > 0
+  && normalizedOptions.value.every(opt => props.modelValue.includes(opt.value)),
+)
+
+function toggleAll() {
+  if (allSelected.value) {
+    emit('update:modelValue', [])
+  } else {
+    emit('update:modelValue', normalizedOptions.value.map(opt => opt.value))
+  }
+}
+
 function isChecked(value: string | number) {
   return props.modelValue.includes(value)
 }