Protective bag device for pedestrian and the like

In order to inflate an airbag of a protective bag device for a pedestrian and the like as uniformly as possible and to relax the heat resisting property required for the airbag, an airbag (10) has a gas-generator storage chamber (15) at the lower surface thereof. The gas-generator storage chamber (15) houses most of a gas generator (30). A gas guide member (20) is disposed to surround gas jet ports (31) at the end of the gas generator (30). Outlets (26, 27) of the gas guide member (20) are arranged above a seaming section 16 in the airbag (10). An entry (25) of the gas guide member (20) and an opening (17) of the airbag (10) are firmly bound to the gas generator (30) with a band (32).