A head protecting airbag device comprises an airbag and a gas feeder
member. The airbag includes a main portion, an inlet port and a plurality
of mounting portions. The inlet port is connected above an intermediate
pillar portion to a gas feeder so as to admit inflating gas downward into
a gas receiving portion of the main portion. The mounting portions are
composed of a vicinity mounting portion arranged close to the inlet port,
and general mounting portions. A recess is formed between the vicinity
mounting portion and the inlet port. This recess substantially enlarges
the length of the outer peripheral edge of the vicinity mounting portion
facing the inlet port and the outer peripheral edge of the inlet port
facing the vicinity mounting portion, thereby increasing the possible
separation of the vicinity mounting portion and the inlet port.