An airbag module-equipped seat in which the periphery of an attachment portion of a guide member that guides a deployment direction of an airbag has a compact size and the guide member can be attached easily while maintaining satisfactory deployment performance of the airbag. This seat includes an airbag module attached to a side frame, a guide member that guides a deployment direction of the airbag module, and an attachment member for attaching the guide member to the side frame. The side frame has an attachment hole for the attachment member at a position different from a shaft portion for attaching the airbag module. The attachment member has a holding space in which an end of the guide member is held in a detachable manner, and is inserted into the attachment hole in a state in which the end of the guide member is held in the holding space.