The invention relates to a vehicle seat and a manufacturing method thereof. Embodiments of the present invention may include a vehicle seat having a cushion pad, a seat skin, webbing, and a retaining structure. The cushion pad is configured to cover a seat frame and to be attached to the seat frame. The seat skin is configured to cover the cushion pad. The seat skin is provided with a developing portion to be developed by a developing force of an airbag. The webbing is connected to the seat skin so as to transmit the developing force of the airbag to the developing portion. A fastener is provided at a fixation portion of the webbing. The fastener is fastened to the seat frame. The retaining structure retains the fastener at a predetermined position with respect to a back surface of the cushion pad in a state prior to the fastening the fastener to the seat frame.