A gas generator (P) comprising a cylinder (1) containing a high pressure gas, a cup-like housing (4) containing a transfer charge (2) and an ignition means (3), and an outer tube (5) for holding the cylinder (1) and the housing (4) while coupling, wherein the cylinder (1) and the housing (4) are held while being coupled such that a rapture disc (6) for hermetically sealing the cylinder (1) and keeping the pressure thereof faces the ignition means (3) contained in the housing (4) and the transfer charge (2) has a doughnut-like shape.
