To provide a bicycle with a built-in shock absorber, in a wheel interior structure contrived to reduce a shock from a wheel of the bicycle or the like, and to provide the wheel mounted with the shock absorber in the inside of the wheel.

In a wheel mounted with a shock absorber in the inside of the wheel, a spiral-like spring (2) is provided to be directed toward a bearing (3) of the central part in the inside of an outer circumference (1) of the shock absorber, the outer circumference (1) of the shock absorber and the spiral-like spiral spring (2) are fixed by a rivet (9) for fixing the outer circumference and the spring, using the central part as the bearing (3), and are fixed also by an irregular combination part (8) for fixing the wheel (10) and the spring, and a washer (7) for preventing the side run-out of the shock absorber and the irregular combination part (8) for fixing the wheel (10) and the spring are fixed concurrently by the rivet (9) for fixing the outer circumference and the spring.