A motor vehicle seat with integrated occupation detector is featured having an upper frame, which supports seat upholstery or a seat shell, and a lower frame, which is secured in the vehicle, and mechanical mounting elements to support the upper frame in the lower frame. The mounting elements are designed in such a way that they are deformed elastically under the weight of a seat user, the occupation detector comprising at least one measuring pick-up, which measures the elastic deformation of the mounting elements.