Abstract: A radiotherapy treatment table is formed as a mobile table having a vertically movable patient supporting plane freely suspended at one end, all the wheels of said table being individually or jointly driven by a motor and turnable relative to the wheeled frame, a positioning and steering device being adapted to sense the position of the treatment table relative to a radiotherapy station and to drive and steer the table to a desired position in response to a measured actual position. The positioning and steering device may comprise sensors for inductively, optically or ultrasonically sensing the actual position of the table in an inductively, optically or ultrasonically marked coordinate system, and may also comprise a computer for controlling the positioning of the table and any preprogrammed movements relative to a treatment isocenter that may be necessary during the treatment.