Provided is a remotely operated actuator capable of accurately changing by remote operation the attitude of a tool provided at the front end of an elongated pipe section. A remotely operated actuator comprises an elongated shaped spindle guide unit (3) and a front end member (2) which is attached to the front end of the spindle guide unit (3) so that the attitude of the front end member (2) can be changed and which rotatably supports a tool (1). The spindle guide unit (3) is provided therein with a rotation shaft (22) which transmits rotation to a spindle (13) and also with a through guide hole (30a) which is open at both ends of the spindle guide unit (3). The attitude of the front end member (2) is changed by advancing and retracting an attitude operation member (31) by means of a drive source (42) for attitude change, the attitude operation member (31) being inserted through the guide hole (30a) so that the attitude operation member (31) can be advanced and retracted. An attitude control means (53) for controlling the drive source (42) for attitude change performs control for moving the attitude operation member (31) from a reference position (P0), which is the operation start position, to target positions (P1, P2), and the control includes a process for temporarily moving the attitude operation member (31) in the direction in which the attitude operation member (31) separates from the target positions (P1, P2).La présente invention concerne un actionneur commandé à distance capable de modifier précisément par commande à distance lattitude dun outil disposé à lextrémité avant dune section de tuyau allongée. Un actionneur commandé à distance comprend une unité de guidage de broche formée allongée (3) et un composant dextrémité avant (2) qui est raccordé à lextrémité avant de lunité de guidage de broche (3) de sorte que lattitude du composant dextrémité avant (2) puisse être modifiée et qui soutient de façon rotative un outil (1). Lunité de guidage de broche (3) es
