A remote controlled actuator assembly includes an elongated guide section (3), a distal end member (2) fitted to the guide section (3) for alteration in attitude, and an operating tool (1) retained by the distal end member (2). An attitude altering member (31) within the guide section (3) is reciprocally movably inserted by an attitude altering drive source (43) to alter the attitude of the distal end member (2). The attitude altering drive source (43) is controlled by an attitude altering controller (63). An attitude detection unit (9) detects the attitude of the distal end member (2) relative to the guide section (3). A calibrator (65), by use of the attitude information detected by the attitude detection unit (9), corrects or generates a command value which the attitude altering controller (63) outputs to the attitude altering drive source (43).
