To provide a stopper member of a moving housing by which locking of the part to be locked to a lock can be easily and surely carried out while cushioning impact received from the moving housing, the part to be locked does not come off from the lock by the reaction of the impact, and vibration due to the impact is hardly transmitted to the moving housing.

The stopper member 1 is molded as a single body and attached to a base 3 located at a start end or a finish end of the moving locus of the part 6 to be locked arranged in the moving housing 2 for housing articles to hold the stop condition of the moving housing 2. The stopper member 1 is constituted of an attachment 4 for attaching to the base 3, an elastic impact cushion 5 continuously protruding from the attachment 4, the lock 7 arranged at the front end part of the impact cushion 5 for removably locking the part 6 to be locked arranged at the opposite part of the stopper member 1 of the moving housing 2, and a guide 8 for introducing the part 6 to be locked into the lock 7.