ATTACHMENT STRUCTURE FOR SIDE AIRBAG DEVICE

An attachment structure, for a side airbag device including an airbag that is to be deployed and inflated on a side of an occupant seated on a seat in a vehicle interior under pressure of a gas supplied from an inflator, includes an attachment member via which the airbag is attached inside the seat. The attachment member includes a support portion that supports the airbag before the airbag is deployed and inflated, an attachment portion that is attached inside the seat, and a guide portion that guides the airbag to a seat outer side at a time when the airbag is deployed and inflated. The guide portion is provided so as to correspond to a part of the airbag supported by the support portion.