The device which serves for the adjustable mounting of a panel (1) to a frame element (5) provided with a lower assembly profile (51) comprises an anchoring bolt (4) serving to hold the panel (1) which comprises anchoring pins (42) on both sides which are held in grooves which lie opposite each other within the assembly profile (51). The panel consists of two glass panels (1a, 1b) connected to each other which comprise at least two recesses (11a, 11b) corresponding to each other, in which preferably cylindrical, outer eccentric elements (2a, 2b) are held preferably in a clearance-free way, which comprise eccentrically arranged, preferably cylindrical openings (21a, 21b) which are orientated concentrically with each other after assembly and preferably hold the introduced shaft (31) of an inner eccentric element (3) in a clearance-free way, which shaft (31) comprises an eccentrically arranged, preferably cylindrical opening (311), in which the anchoring bolt (4) is held.