The invention concerns a device for connecting a gas-operated appliance on a gas cartridge valve (23) comprising; a valve body (2) integral with the gas-operated appliance; an axial coupling ring (3) integral with the valve body (2) having at least one elastic tab (4) capable radially of being engaged in an annular groove (27) of a valve of the cartridge; a locking rotary ring (10) capable of occupying a locking position wherein the rotary ring (10) maintains each elastic tab (4) engaged in the groove (27) and an unlocking position wherein the rotary ring (10) allows each elastic tab (4) to be released from the groove (27), and a cylinder (16) provided with a conduit (18) capable of clearing a valve shutter. The invention is characterized in that the rotary locking ring (10) has radial coupling means capable of co-operating with complementary radial coupling means provided on the gas cartridge valve (23) enabling, through rotation of the cartridge, the device to be shifted from a locking position to an unlocking position.