A remote control actuator includes a spindle guide section (3), a distal end member (2) fitted to the tip of the spindle guide section for alteration in attitude, a tool (1) provided rotatably in the distal end member, a tool rotation drive source (41) for rotating the tool, and an attitude altering drive source (42) for altering the attitude of the distal end member. The spindle guide section has therein a rotary shaft (22) for transmitting a rotation of the tool rotation drive source to the tool, and an attitude altering member (31) capable of being selectively advanced or retracted by the attitude altering drive source for altering the attitude of the distal end member. A position detector (47) is provided for detecting the advanced or retracted position of the attitude altering member at a site distant from the attitude altering drive source.
