The invention relates to a modular system for producing walls or enclosed spaces, in particular for work places or cloth changing rooms and is characterised in that it consists of wall-container modules (5) embodied in the form of enclosed shafts comprising at least one opening (6). The modules are connected to each other at different angles of rotation (7) in such a way that the angle between two connected parts corresponds to a base angle (8) of a triangular in a plane view module part in such a way that the modules are assembleable in a polygonal or circular manner. Each module comprises a hollow prism consisting of at least three lateral faces or of an irregular prism, or arched bodies fitted with different opening possibilities (doors, flaps, rotatable or collapsible parts or simple openings) which have at least one top angle (9) in a plane view (recognisable in a plane view as a polygon part, separable from geometrical view point and not separable from spatial view point) in such a way that the modules are assembleable in the polygonal or circular manner for forming a column. The modules are pivotally connected to each other by means of one (only when the module has a pure triangular or rhombic shape) or two vertical axes (10,11) which are opened and/or used as a hinge.