PURPOSE: To enhance protection against burglary by constituting a wire lock with a lock main body and a wire provided with a wire terminal locked with the lock main body and equipping the lock main body with a flash light in one piece.

CONSTITUTION: A wire 3 is housed in a take-up rail of a lock main body 2 so as to eliminate any possible obstacle during running operation. During running operation at night, a flash light is lit up, thereby arousing attention to a car running behind or the surrounding environment. During the operation, it is arranged to enhance visual confirmation to an extreme extent by lighting up the flash light directly under a saddle S so that the flash light may agree with the eyes of a driver in a car running behind. When parking, the wire 3 is sent out, and allowed wheels W to pass, thereby inserting a lock 2 of a wire terminal 3a into a lock hole 2a and locking a bicycle B. Furthermore, the flash light 4, which is expensive, is also locked, which eliminate the need to remove the light 4 and prevent burglary resultant from carelessness about locking. This construction makes it possible to enhance safety during running at night and protect the flash light from any potential theft.