To provide an aircraft piloting mechanism that can easily perform switching from an active mode to a bypass mode or a block mode by using a mechanical actuator unit.

The aircraft piloting mechanism includes an actuator unit 2. The actuator unit 2 includes: a main motor 3 for supplying a motive force to drive the posture control rudder surface 1 of an aircraft; a motive force transmission mechanism 4 for transmitting a motive force from the main motor 3 to the posture control rudder surface 1; and a clutch mechanism 5 for selecting any one of an active mode for permitting motive force transmission to the posture control rudder surface 1 by the motive force transmission mechanism 4, a bypass mode for blocking the motive force transmission from the motive force transmission mechanism 4 to the posture control rudder surface 1 and permitting free movement of the posture control rudder surface 1, and the block mode for blocking the motive force transmission from the motive force transmission mechanism 4 to the posture control rudder surface 1 and inhibiting movement of the posture control rudder surface 1.