An object detection system for a saddle-type vehicle is provided. The system comprises an object detection unit configured to detect an object, wherein the object detection unit is provided on a handlebar which is rotatable to a body of the vehicle; an inclination detection unit configured to detect an inclination of a saddle-type vehicle; a steering angle detection unit configured to detect a steering angle of the handlebar to the body; and a position specification unit configure to specify a position of the object detected by the object detection unit, and correcting the position so that the inclination detected by the inclination detection unit is upright and the steering angle of the handlebar detected by the steering angle detection unit is directed straight.