An airbag device housed in an instrument panel of a vehicle in order to protect an occupant in a passenger seat, the airbag device comprising: an inflator for generating inflation gas; and an airbag that inflates and deploys toward the occupant side via gas released from the inflator; the airbag having a front protection part located in front of the occupant when deployed and a pair of side protruding parts (18L, 18R) located on the sides of the front protection part in the vehicle width direction and protruding further to the occupant side than the front protection part; and a cross tether extending in the direction intersecting a deploying direction of the airbag and connected to the inner surface of the airbag and a pair of first front-rear tethers (22L, 22R) connected to the cross tether at the front ends thereof and connected to the front protection part at rear ends being provided in the inside of the airbag, characterised in that: a pair of second front-rear tethers (24L, 24R) are provided inside in the vehicle width direction of the pair of first front-rear tethers (22L, 22R); front ends of the second front-rear tethers (24L, 24R) are connected to the cross tether, and rear ends are connected to the front protection part; in the front protection part located between the pair of side protruding parts (18L, 18R), a pair of left and right intermediate protruding parts (26L, 26R) protruding toward the occupant side are formed between the first front-rear tethers (22L, 22R) and the second front-rear tethers (24L, 24R); a central protruding part protruding toward the occupant side is formed between the pair of second front-rear tethers (24L, 24R); and wherein the central protruding part protrudes farther toward the occupant side than the intermediate protruding parts (26L, 26R). an inflator for generating inflation gas; and an airbag that inflates and deploys toward the occupant side via gas released from the inflator; the airbag having a front protection part located in front of the occupant when deployed and a pair of side protruding parts (18L, 18R) located on the sides of the front protection part in the vehicle width direction and protruding further to the occupant side than the front protection part; and a cross tether extending in the direction intersecting a deploying direction of the airbag and connected to the inner surface of the airbag and a pair of first front-rear tethers (22L, 22R) connected to the cross tether at the front ends thereof and connected to the front protection part at rear ends being provided in the inside of the airbag, characterised in that: a pair of second front-rear tethers (24L, 24R) are provided inside in the vehicle width direction of the pair of first front-rear tethers (22L, 22R); front ends of the second front-rear tethers (24L, 24R) are connected to the cross tether, and rear ends are connected to the front protection part; in the front protection part located between the pair of side protruding parts (18L, 18R), a pair of left and right intermediate protruding parts (26L, 26R) protruding toward the occupant side are formed between the first front-rear tethers (22L, 22R) and the second front-rear tethers (24L, 24R); a central protruding part protruding toward the occupant side is formed between the pair of second front-rear tethers (24L, 24R); and wherein the central protruding part protrudes farther toward the occupant side than the intermediate protruding parts (26L, 26R). a pair of second front-rear tethers (24L, 24R) are provided inside in the vehicle width direction of the pair of first front-rear tethers (22L, 22R); front ends of the second front-rear tethers (24L, 24R) are connected to the cross tether, and rear ends are connected to the front protection part; in the front protection part located between the pair of side protruding parts (18L, 18R), a pair of left and right intermediate protruding parts (26L, 26R) protruding toward the occupant side are formed between the first front-rear tethers (22L, 22R) and the second front-rear tethers (24L, 24R); a central protruding part protruding toward the occupant side is formed between the pair of second front-rear tethers (24L, 24R); and wherein the central protruding part protrudes farther toward the occupant side than the intermediate protruding parts (26L, 26R).