A vehicular seat includes: a seat cushion that is disposed offset with respect to a vehicle width direction center of a vehicle; an airbag that is provided in the seat cushion and which, upon receiving a supply of gas, is expanded and deployed in such a way as to suppress a seated occupant from moving toward the front of the vehicle; and gas supplying device which, when actuated at the time of a frontal impact of the vehicle, supplies gas to the airbag in such a way that a vehicle width direction outer side section of the airbag with respect to a vehicle width direction center of the seat cushion is expanded and deployed before an inner side section.