Airbag device

An airbag device comprising

• an airbag stored in a storage part provided in front of an occupant seated on a seat, the airbag configured to deploy and inflate to protrude toward a rear side of a vehicle by flowing of an inflation gas therein, to protect the occupant, wherein:
• the airbag has an occupant protecting section configured to protect the occupant on a rear surface at the time of completion of inflation;
• the occupant protecting section includes:
• an upper half body restraining surface, disposed in front of the occupant at the time of completion of inflation, configured to receive the upper half body of the occupant;
• and
• a head receiving section formed in a left region and a right region of a center in a left-right direction of the occupant protecting section to protrude rearward from the upper half body restraining surface, in a region above the upper half body restraining surface, the head receiving section having a left restraining surface and a right restraining surface configured to receive a side surface of a head;
• and
• the head receiving section is configured so that a part between the left restraining surface and the right restraining surface upon completion of inflation is continued from the upper half body restraining surface.