DEVICE FOR ASSEMBLING A SIDE MEMBER AND A CHASSIS CROSS MEMBER OF A MOTOR VEHICLE, ASSEMBLY AND VEHICLE COMPRISING SUCH A DEVICE

An assembly device of a side member and a chassis cross member of a motor vehicle. The assembly device is formed of a single rigid metal piece, characterized in that the assembly device presents an assembly surface portion in contact with each other, by welding, of the assembly device and an anchoring element of the rear axle of the motor vehicle to the chassis of this motor vehicle.