Airbag device and gas generator

An airbag device, comprising:

• a gas generator including
• an ignition device,
• a gas generating agent ignited by the ignition device and generating a combustion gas, and
• a housing accommodating the ignition device and the gas generating agent and provided with a gas discharge port;
• a shielding member covering an outside of the housing and configured to move to a shielding position located in a discharge direction of the combustion gas from the gas discharge port and to a non-shielding position not located in the discharge direction of the combustion gas from the gas discharge port;
• an elastic member disposed between the housing and the shielding member and configured to energize the shielding member to position the shielding member at the shielding position or the non-shielding position in accordance with a magnitude of an external force received by the shielding member;
• and
• an airbag bag body disposed in communication with an inside of the housing through the gas discharge port of the gas generator, the airbag bag body accommodating the shielding member and the elastic member.