The present invention relates to an adjustment device for exercise apparatuses, which comprises a flange (4), a coupling body (6) coupled to said flange (4) by means of a pressure bar (61d), adjustment protrusion (6e) and pressure pin (6g), a coupling ring (5) through which the coupling body (6) is passed, a vertical arm (8) connected to said coupling body (6) so as to be adjusted in the back and forth direction and rotationally, and a coupling arm (9) connected to said vertical arm (8).