AIRBAG DEVICE FOR PROTECTING HEAD IN CAR

At a time of deployment of an airbag, a rear portion of the airbag and a tension imparting member are prevented from hooking on an upper end of a quarter pillar garnish and impeding deployment of the airbag. An airbag (20) is contained along a door opening (46). An upper expansion portion (20D) is formed on an upper edge side of a rear seat expansion portion (20B), and a rear expansion portion (20E) is formed at a rear end side upper portion. The upper expansion portion is expanded and deployed at the compartment outer side of a terminal part (34A). A rear end side attachment portion (20E) is set at the rear end side of the rear expansion portion (20E), and the rear expansion portion expands inside a quarter pillar garnish (48). A rear end lower portion of the rear seat expansion portion is coupled to the vehicle body by a rear side strap (68). A border portion (72) between a roof head lining (34) and the pillar garnish is specified such that a deployment area (Q) of the upper expansion portion falls within a range where the roof head lining is arranged.