diff --git a/geneit_backend/src/controllers/families_controller.rs b/geneit_backend/src/controllers/families_controller.rs
index 13f6832..57e751f 100644
--- a/geneit_backend/src/controllers/families_controller.rs
+++ b/geneit_backend/src/controllers/families_controller.rs
@@ -79,6 +79,13 @@ pub async fn single_info(f: FamilyInPath) -> HttpResult {
         .json(families_service::get_family_membership(f.family_id(), f.user_id()).await?))
 }
 
+/// Attempt to leave a family
+pub async fn leave(f: FamilyInPath) -> HttpResult {
+    families_service::remove_membership(f.family_id(), f.user_id()).await?;
+
+    Ok(HttpResponse::Accepted().finish())
+}
+
 /// Get the list of users who belongs to a family
 pub async fn users(f: FamilyInPath) -> HttpResult {
     Ok(HttpResponse::Ok().json(families_service::get_memberships_of_family(f.family_id()).await?))
diff --git a/geneit_backend/src/main.rs b/geneit_backend/src/main.rs
index 6460f11..febab2b 100644
--- a/geneit_backend/src/main.rs
+++ b/geneit_backend/src/main.rs
@@ -97,6 +97,10 @@ async fn main() -> std::io::Result<()> {
                 "/family/{id}/info",
                 web::get().to(families_controller::single_info),
             )
+            .route(
+                "/family/{id}/leave",
+                web::post().to(families_controller::leave),
+            )
             .route(
                 "/family/{id}/users",
                 web::get().to(families_controller::users),
diff --git a/geneit_backend/src/models.rs b/geneit_backend/src/models.rs
index 2067307..4c24ead 100644
--- a/geneit_backend/src/models.rs
+++ b/geneit_backend/src/models.rs
@@ -111,8 +111,8 @@ pub struct FamilyMembership {
     family_id: i32,
     name: String,
     time_create: i64,
-    is_admin: bool,
+    pub is_admin: bool,
     invitation_code: String,
-    count_members: i64,
-    count_admins: i64,
+    pub count_members: i64,
+    pub count_admins: i64,
 }
diff --git a/geneit_backend/src/services/families_service.rs b/geneit_backend/src/services/families_service.rs
index 8e2afca..171d905 100644
--- a/geneit_backend/src/services/families_service.rs
+++ b/geneit_backend/src/services/families_service.rs
@@ -132,9 +132,49 @@ pub async fn get_family_membership(
     })
 }
 
+/// Delete a family
+pub async fn delete_family(family_id: FamilyID) -> anyhow::Result<()> {
+    // TODO : delete members and couples
+
+    // Remove all memberships
+    db_connection::execute(|conn| {
+        diesel::delete(
+            memberships::dsl::memberships.filter(memberships::dsl::family_id.eq(family_id.0)),
+        )
+        .execute(conn)
+    })?;
+
+    // Remove the family itself
+    db_connection::execute(|conn| {
+        diesel::delete(families::dsl::families.filter(families::dsl::id.eq(family_id.0)))
+            .execute(conn)
+    })?;
+
+    Ok(())
+}
+
 /// Remove a membership to a family
-pub async fn remove_membership(_family_id: FamilyID, _user_id: UserID) {
-    todo!()
+pub async fn remove_membership(family_id: FamilyID, user_id: UserID) -> anyhow::Result<()> {
+    let family = get_family_membership(family_id, user_id).await?;
+
+    if family.is_admin && family.count_admins == 1 {
+        // We need to delete the whole family
+        delete_family(family_id).await
+    } else {
+        // Remove the single membership
+        db_connection::execute(|conn| {
+            diesel::delete(
+                memberships::dsl::memberships.filter(
+                    memberships::dsl::user_id
+                        .eq(user_id.0)
+                        .and(memberships::dsl::family_id.eq(family_id.0)),
+                ),
+            )
+            .execute(conn)
+        })?;
+
+        Ok(())
+    }
 }
 
 /// Remove all memberships of user
diff --git a/geneit_backend/src/services/users_service.rs b/geneit_backend/src/services/users_service.rs
index c726e8c..e208a59 100644
--- a/geneit_backend/src/services/users_service.rs
+++ b/geneit_backend/src/services/users_service.rs
@@ -177,9 +177,10 @@ pub async fn delete_account(user: &User) -> anyhow::Result<()> {
     login_token_service::disconnect_user_from_all_devices(user.id()).await?;
 
     db_connection::execute(|conn| {
-        diesel::delete(users::dsl::users.filter(users::dsl::id.eq(user.id().0))).execute(conn)?;
-        Ok(())
-    })
+        diesel::delete(users::dsl::users.filter(users::dsl::id.eq(user.id().0))).execute(conn)
+    })?;
+
+    Ok(())
 }
 
 /// Mark account as validated