To provide a swing arm pivot structure for a motorcycle which can prevent rubbing between a swing arm and a body frame with a simple structure and can reduce a manufacturing cost for the motorcycle. The swing arm pivot structure includes a swing arm for supporting a rear wheel, a pivot shaft mounted to a body frame and inserted through a swing arm pivot of the swing arm, a first bearing located between one end portion of the swing arm pivot and the body frame for pivotably supporting the swing arm, a first collar located between the inner circumference of the first bearing and the pivot shaft, and a second collar located between the first collar and the body frame. The second collar has a rigidity different from the rigidity of the first collar and the body frame.