Propeller shaft

A propeller shaft, comprising:

• a shaft having, on an outer circumference of an end thereof, a plurality of locking protrusions for a spline coupling;
• a tube having, on an inner circumference thereof into which the shaft is inserted, a plurality of locking grooves, the locking grooves engaging with the locking protrusions to form the spline coupling;
• a dynamic damper provided inside the tube, disposed to correspond to the end of the shaft, and absorbing vibrations transmitted from a driving system;
• and
• a rubber stopper interposed between an outer circumference of the dynamic damper and the inner circumference of the tube to support the dynamic damper, and provided to correspond to the end of the shaft to limit sliding of the tube at normal times, the rubber stopper being broken by a pushing operation of the tube when an impact load greater than a collapse load of the rubber stopper acts on the rubber stopper, thereby permitting the sliding of the tube,
• wherein the rubber stopper comprises a plurality of connecting bridges that are repeatedly formed along an inner circumferential direction of the tube and spaced apart from each other by a predetermined interval, the connecting bridges connecting the outer circumference of the dynamic damper to the inner circumference of the tube.