Abstract: Shown and described is a device for back a plumbing fixture, in particular to a wall, essentially comprising a mounting rail preferably made of metal, which contains a large number of holes, slots or the like provided for the wall mounting and to the mounting of mounting plates for a plumbing fixture, the two rail longitudinal edges being designed as attachment zones offset from the mounting level. The object of the invention is to create a new device for back mounting a plumbing fixture with which in a simple fashion a number of a plumbing fixture can be mounted to a wall with precisely the same spacing from each other and in a precise arrangement to each other.