AIRBAG DEVICE AND MANUFACTURING METHOD THEREOF

[Problem] To provide an airbag device and a manufacturing method thereof capable of favorably achieving an anticipated deployed state of the airbag cushion after completion of expansion. [Resolution Means] An airbag cushion, which expands and deploys between adjacent seats in a passenger compartment, is composed of a top panel and bottom panel that are separated and face each other in the vertical direction when deployed, side panels connecting the peripheral edges of the top panel and the bottom panel, a protruding part that protrudes upward from the top panel, and a cylindrical inflator attached along the inner surface of the side panel on the side of the protruding part, is stowed in a folded state by overlaying the top panel and the side panel provided with the attachment part of the inflator, and lining up a first roll part which is the protruding part rolled into a roll shape, a fold-back part which is the first side part folded back in a manner to cover the attachment part of the inflator, and a second roll part which is the second side part rolled into a roll shape, on top of the top panel with the second roll part in the center.