Abstract: The attachment plate has a rectangular planar front wall (2) with two groups (3) each with three mounting sites (3a-3c). These groups are used for mounting sanitary fixtures such as for example isolating valves and the like. The two groups (3) have in each instance two mounting sites (3b, 3c) disposed on a straight line (A). Each group (3) has moreover at least one third mounting site (3a) at a distance (Y) one from the other which is different from the distances (X, Z) of the remaining mounting sites (3b, 3c). The mounting sites (3a-3c) are disposed in such a manner on the attachment (1) that all commonly used sanitary fixtures and the like can be mounted.