To provide an attitude controlling device for maintaining a model aircraft in a stable attitude with respect to changes in air currents.

An antenna 14 receives radio waves. A receiver 51 receives a control signal for controlling an airframe via the antenna 14. A horizontal direction detecting sensor 20a detects an inclination in the horizontal direction of the airframe. A perpendicular direction detecting sensor 20b detects an inclination in the perpendicular direction of the airframe. A feedback controller 52 outputs a signal for maintaining the airframe in a constant attitude when it is determined that the airframe is not flying with a constant attitude from the control signal from the receiver 51, the inclination detected by the horizontal direction detecting sensor 20a, and the inclination detected by the perpendicular direction detecting sensor 20b. Servo motors 21, 22 and 23 operate to maintain the airframe in a constant attitude by this signal.