To provide a roll angle controlling device for a radio controlled model which can facilitate the steering operation of an operator, and can stabilize the posture of a model main body in a wide speed region.

This roll angle controlling device 21 is used for a radio controlled model for which a radio control receiver and a front wheel steering section 20 having a motor 13 for steering are provided on a vehicle body 2, and the vehicle body 20 rolls in response to the motion of the front wheel steering section 20, and at the same time, which has self-stability by which the roll angle becomes approximate 0° when a manipulated variable to the motor 13 for steering is under a neutral state. The roll angle controlling device 21 is equipped with a roll angle detecting means 35 which detects the roll angle of the vehicle body 2, and a controlling means which brings the roll angle θi closer to a roll angle target value by outputting the manipulated variable to the motor 13 for steering from a differential between the roll angle θi (a detected value) from the roll angle detecting means 35 and the roll angle target value from the radio control receiver.