The present invention relates to a small cubicle, especially a toilet cubicle, which can be freely assembled and comprises a bottom unit (1), a top unit (2), a wall element (3) and corner posts (4) connecting the wall elements, bottom unit and top unit to each other. All the above-mentioned components are made of plastic. In order to create said cubicle which can be freely assembled, is almost entirely composed of plastic yet holds together mechanically, the invention includes reciprocally overlapping connector elements (5,6,7) on the posts, wall elements and top and bottom units and/or on the wall elements and the posts. Said connector elements are provided with bore holes and are aligned with each other when the respective parts are assembled. Locking bolts (9), guaranteeing that the connected parts hold together, extend therethrough.