A first common tangent of a first pulley and a second pulley is in parallel with the scanning direction. A second external common tangent of the first pulley and a third pulley intersects with the scanning direction. A motor has a shaft extended in a first direction and connected to the third pulley. An endless belt is wound on the first, second, and third pulleys. A belt connecting portion is provided on the carriage and connected to the belt in a portion on the first external common tangent. The distance between the head passing region and the third pulley is greater than a radial difference obtained as the length of the radius of the motor minus the radius of the third pulley. The distance between the head passing region and the belt connecting portion is smaller than the radial difference.