To simplify a structure and form this device in a small size by pushing down one brake member for a rod to a supporting point arranged on a housing by a supporting point arranged on a brake member for a housing, and inclining the brake member for the rod.

A brake housing 2 is guided to guide metals 10, 11, and is slid on a guide rod 1. A brake member 4 for a housing overcomes against a resistance of packing 12, 13 for sealing a release piston 9 by a spring 7, and is pushed out to the release piston 9 side. In this time, a brake member 3 for a rod is pushed out to the release piston side by a supporting point 6 simultaneously with pushing the release piston 9 out by a projection part 15 arranged on the brake member 4, and the brake member 3 is inclined and stopped after colliding with a supporting point 5. After that, the brake member 4 is inclined in a reverse direction around the supporting point 6. The guide rod 1 is fixed to the housing 2 by friction with respect to reaction generated by inclining of both brake members 3, 4.