A remote controlled actuator includes a spindle guide section (3) of an elongated configuration, a distal end member (2) fitted to a distal end of the spindle guide section (3) through a distal end member connecting unit (15) for alteration in attitude, a tool (1) rotatably provided to the distal end member (2), a tool rotating drive source (41) for rotating the tool, and an attitude altering drive source (42) for manipulating the attitude of the distal end member. The distal end member rotatably supports a spindle (13) then holding the tool (1). The spindle guide section (3) includes a rotary shaft (22) for transmitting rotation of the tool rotating drive source to the spindle and a guide hole (30a). A flexible attitude altering member (31) capable of altering the attitude of the distal end member is reciprocally movably inserted within the guide hole (30a).