A golf club has within the grip a main device, a connector, a wireless module, an antenna, a light emitting element, and an optical fiber. The main device is a device that includes a sensor such as a motion sensor, a circuit such as a CPU, and a battery. The light emitting element is an indicating means that emits light in accordance with the state of a component mounted in the golf club. The light emitted by the light emitting element is guided to the grip end by the optical fiber and emitted to the outside of the grip via the grip end.