Abstract: The modular furniture system according to the invention consists of the elements: that allow for construction of the combined set of any size in width, depth and height. The composition of the module (1) assembled from four tubular supports (2) connected to each other rigidly and arranged relative to each other so that the surface between the longitudinal axes and perpendicular to the axis forms a square or a rectangle that is a multiple of the square, wherein supports (2) are made of tube having a cross-section shape with at least four axes of symmetry, inside the vertical metal tubular support (2) of the module, a connector (3) is positioned in the form of a bar and its cross-sectional dimensions are adapted to the internal dimensions of the support (2) which at the same time on the other side can be connected to the second support (2) or (4) or the plug (5) or furniture foot (6) or furniture wheel assembly (7 or offset support (8).

Abstract: A swivel chair has of an upper frame comprising a seat and, optionally, comprising a back rest, and an underframe and a supporting column. The supporting column extends between the upper frame and the underframe. The upper frame is pivotally mounted at the upper end of the supporting column by a bracket and the supporting column is mounted to the underframe. The supporting column is linked with the underframe outside the vertical projection of the upper frame and the seat, at its periphery, is provided with a recess, the width of which corresponds substantially to the outer diameter of the supporting column. The back rest, if present, is provided with a back rest cleavage corresponding to the recess.