A remote controlled actuator includes a spindle (13) for holding a tool (1), a spindle guide section (3) of an elongated configuration, a distal end member (2) rotatably supporting the spindle, and a drive unit housing (4a) connected to a base end of the spindle guide section. The distal end member is fitted to the spindle guide section for alteration in attitude. The spindle guide section includes an outer shell pipe, a rotary shaft, and guide pipe. Within the guide pipe, an attitude altering member is inserted to alter the attitude of the distal end member. A connection device (51) detachably connects the spindle guide section with the drive unit housing.
