A wall device for supporting fittings includes a plurality of horizontal and vertical uprights (2), which can be assembled together to form the wall device. The horizontal and vertical uprights are mutually coupled together by at least one first adjustable fixing device (10), with connection elements (20) used for joining the fittings. The uprights (2) include at least a first channel section (5) and a second channel section (6), each including, starting from a respective bottom side (50), two respective opposed side parts (51) nearly orthogonal to the bottom side (50), and two respective first portions (52), parallel to the bottom side (50). The sides, parts and portions (50, 51, 52) of at least the first channel section (5) and the second channel section (6) define a respective cavity (55) and longitudinal openings (8) for the first fixing device (10) and for the connection elements (20). At least a first portion (52) of each first channel section (5) has also a second portion (53) orthogonal to the first portions (52) and facing outwards from the respective cavity (55).