Airbag device

An airbag device comprising:

• a case which stores an inflatable airbag, and which includes a protruding opening that allows the airbag being inflated to protrude into a cabin interior, and a peripheral wall section around the protruding opening;
• an airbag cover which covers the protruding opening, and which includes a cabin interior side panel section provided with a door section that is opened when pushed by the airbag being inflated, and a side wall section extended from a rear face to side of the cabin interior side panel section and connected to the peripheral wall section of the case;
• and
• an exposed connection portion which serves as a connection portion between the side wall section of the airbag cover and the peripheral wall section of the case, and which is exposed to a side of the cabin interior, wherein,
• at the exposed connection portion, the peripheral wall section includes an engaging hook that is inverted so as to be away from a side of the protruding opening, and the side wall section includes an engaging hole a peripheral edge of which is engaged with the engaging hook,
• the engaging hook is configured to pass through the engaging hole from an inside to an outside of the side wall section to be engaged with the side wall section, and a tip end section of the engaging hook is configured to protrude from the side wall section at the peripheral edge of the engaging hole so as to be exposed to the side of the cabin interior, and,
• at the peripheral edge of the engaging hole in the side wall section of the airbag cover at the exposed connection portion, a first rib capable of covering the tip end section of the engaging hook which protrudes from the engaging hole in a direction along an opening face of the engaging hole protrudes so as to have a height dimension nearly equal to or more than a height dimension of the tip end section of the engaging hook which protrudes from the engaging hole.