Abstract: A manipulator for industrial purposes constructed with a housing for accommodating therein major component parts such as driving mechanism therefor; a main shaft held in a rotatable manner; an auxiliary shaft concentrically fitted in the main shaft; an arm member fixedly supported on the top of the auxiliary shaft; a hand member for clamp-holding the work-piece therein; a control shaft which is concentrically fitted within the auxiliary shaft; a reversible electric motor fixedly provided on one external surface part of the housing; a worm gear member; a worm provided on the motor; a group of gears or a gear train for moving the auxiliary shaft; another group of gears for rotating the control shaft; a supporting frame integrally formed with the main shaft; an intermittent gear; a device to cause the main shaft to follow the movement of the worm gear after the main shaft is rotated for a certain definite rotational angle; and a device to detect rotation of the main shaft after it is rotated for a certain defini