In this squib for bus connection, a communication and ignition unit which is connected via a pin to a bus line is received within an inner cap, along with a quantity of a first explosive which does not emit gas due to corrosion. Furthermore, between this inner cap and an outer cap in which it is received, there is charged a quantity of a second explosive which is of a different type from said first explosive, and which is used as an explosive for a squib in a conventional inflator.