In existing manufacturing methods wherein a bonded seat is formed by adhering a surface skin material to a pad made from molded foam, defects may occur from curing of the adhesive, such as reduced flexibility and a poor texture on the seat contact surface. In addition, the manufacturing steps therefor are complicated. In order to solve the above problems, the present invention provides a manufacturing method for a vehicle seat having a molded pad and a trim cover that covers the molded pad. The molded pad has a groove, and an adhesive is applied to the inside of the groove. The trim cover is pressed into the inside of the groove, and a steam nozzle is inserted into the molded pad from the surface of the molded pad opposite from the surface covered by the trim cover. Heat or steam from the steam nozzle melts the adhesive inside the groove so as to adhere the trim cover to the groove. It is thus possible to provide a vehicle seat and a manufacturing method therefor with which a contact surface can exhibit a good texture and manufacturing steps can be simplified.