Vehicle seat equipped with side airbag device

A vehicle seat that is equipped with a side airbag device, the vehicle seat comprising:

• an airbag package that includes a side airbag that is housed in a state of being folded-up within a side portion of a seatback, the side airbag being able to restrain at least a region from an abdominal portion to a shoulder portion of a vehicle occupant in an inflated and expanded state;
• a seatback skin at which a burst line portion, that extends toward upper and lower sides of the side portion at a seatback front side of the airbag package, receives inflation pressure of the side airbag and breaks;
• and
• a seatback pad in which a vertical slit portion, that is positioned further toward a seat transverse direction outer side than a front edge portion of the airbag package, extends toward the upper and lower sides of the side portion along the front edge portion, the side airbag inflating and expanding with passing-through the vertical slit portion, and an upper end of the vertical slit portion being positioned further toward a seatback rear side than a lower end of the vertical slit portion.