Dynamic damper and propeller shaft

摘要

This invention provides a dynamic damper 10, in which convex portions 21 protruded in the direction of the inside diameter are provided at plural positions along the circumference of the outer pipe 20, and an elastic body 40 is held between the convex portion 21 and the outer circumference of the weight 30. A stopper portion 32 which is capable of engaging the convex portion 21 of the outer pipe 20 in the axial direction of the pipe is provided on the weight 30.