A compressed gas operated instrument incorporating a connector for a compressed gas cartridge to which the compressed gas cartridge is connectable in sealed manner by means of a supply channel for the compressed gas flowing out of the compressed gas cartridge is provided which incorporates a regulating valve in the supply channel for governing the compressed gas stream through the supply channel. The regulating valve comprises a valve body which is sealed in a valve chamber with respect to a wall of the valve chamber by means of a first seal and is mounted in the valve chamber in displaceable manner. The valve body is connected on the upstream side thereof in sealed manner to a connector element by means of a second seal and also be displaceable with respect to the connector element by displacement thereof in the valve chamber.
