An interior material for a vehicle, comprising: a base material layer; a first reinforcement layer disposed on a surface of a vehicle interior side of the base material layer: a second reinforcement layer disposed on a surface of a vehicle body side of the base material layer; a skin layer disposed on a surface of the opposite side of the first reinforcement layer viewed from the base material layer; a backside layer disposed on a surface of the opposite side of the second reinforcement layer viewed from the base material layer; and an adhesive applied on both surfaces of each of the first and the second reinforcement layers (12, 13), wherein the backside layer comprises a base layer and a functional layer disposed on at least one surface of the base layer to block an air flow to the vehicle body side from the vehicle interior, and to reflect infrared radiation from the exterior of the vehicle, wherein the base layer is a resin film and the functional layer is a metal deposition film deposited on the base layer, the functional layer is directly adhered to the second reinforcement layer, and wherein the base material layer and the first reinforcement layer, the base material layer and the second reinforcement layer, the first reinforcement layer and the skin layer, and the second reinforcement layer and the backside layer are adhered, respectively. a base material layer; a first reinforcement layer disposed on a surface of a vehicle interior side of the base material layer: a second reinforcement layer disposed on a surface of a vehicle body side of the base material layer; a skin layer disposed on a surface of the opposite side of the first reinforcement layer viewed from the base material layer; a backside layer disposed on a surface of the opposite side of the second reinforcement layer viewed from the base material layer; and an adhesive applied on both surfaces of each of the first and the second reinforcement layers (12, 13), wherein the backside layer comprises a base layer and a functional layer disposed on at least one surface of the base layer to block an air flow to the vehicle body side from the vehicle interior, and to reflect infrared radiation from the exterior of the vehicle, wherein the base layer is a resin film and the functional layer is a metal deposition film deposited on the base layer, the functional layer is directly adhered to the second reinforcement layer, and wherein the base material layer and the first reinforcement layer, the base material layer and the second reinforcement layer, the first reinforcement layer and the skin layer, and the second reinforcement layer and the backside layer are adhered, respectively. a second reinforcement layer disposed on a surface of a vehicle body side of the base material layer; a skin layer disposed on a surface of the opposite side of the first reinforcement layer viewed from the base material layer; a backside layer disposed on a surface of the opposite side of the second reinforcement layer viewed from the base material layer; and an adhesive applied on both surfaces of each of the first and the second reinforcement layers (12, 13), wherein the backside layer comprises a base layer and a functional layer disposed on at least one surface of the base layer to block an air flow to the vehicle body side from the vehicle interior, and to reflect infrared radiation from the exterior of the vehicle, wherein the base layer is a resin film and the functional layer is a metal deposition film deposited on the base layer, the functional layer is directly adhered to the second reinforcement layer, and wherein the base material layer and the first reinforcement layer, the base material layer and the second reinforcement layer, the first reinforcement layer and the skin layer, and the second reinforcement layer and the backside layer are adhered, respectively.