Abstract: An overlay floor for motor vehicles, applied on the mother floor of the vehicle, intended to fix seats, wheelchairs or other equipment therein, having a shape adapted to the mother floor of the vehicle in which it is to be mounted. In the floor plate there are made longitudinal mounting sockets, into which two-part mounting rails are inserted. The mounting rails consist of an upper rail with flanges and a groove for equipment fasteners and a lower base connected to it. The mounting sockets are made in a uniform sheet of the floor plate as through, longitudinal holes for the profiles of the mounting rails. The upper rails have a longitudinal lock at the bottom for connection to the lower bases which have a corresponding longitudinal lock along the upper surfaces of the bases.