A shock-absorbing mechanism of the present invention may include a cylindrical member that is configured to axially receive a collision load applied thereto via a load-receiving member and to be axially deformed due to the collision load, and a load absorbing member that is received in the cylindrical member so as to be compressed with the cylindrical member when the collision load is applied thereto and that is capable of expanding from its compressed condition by a certain amount in a restoring direction when the collision load is released, wherein a pressing portion of a frame member has a pressing portion for axially pressing the load absorbing member when the collision load is applied thereto has a space which a portion of the compressed load absorbing member enters.