The invention relates to a joining device for joining a vehicle's frame (1) to a wheel suspension (2) for a vehicle. The joining device comprises a V-shaped stay (3) where the V-stay is mounted on the wheel suspension (2) via a bearing (5). The bearing (5) comprises an internal bearing element with an external partly spherical abutment surface and an external bearing element with an internal partly spherical abutment surface, which bearing in a normal position of the vehicle has a centre axis (14, 200) oriented substantially perpendicularly relative to a base on which the vehicle is located. According to the invention the internal bearing element comprises a stopper element (30, 302, 405) which cooperates with a locking portion (33, 401, 401') of the external bearing element and prevents the external bearing element from unintentionally being released from the internal bearing element. The stopper element (30, 302, 405) in a plane substantially perpendicular to the centre axis, forms an elongated cross section with a longitudinal direction of the cross section oriented in a direction substantially across the vehicle.