A vehicle comprising a defroster structure, the defroster structure comprising: a blow-out port that is provided at a position that substantially faces a windshield glass of the vehicle, at a substantially central portion in the vehicle transverse direction of an instrument panel positioned at a front portion of a passenger compartment of the vehicle, and that is configured to blow out air-conditioned air that is from an air conditioner; a front-rear partitioning wall that is provided at an interior of the blow-out port, that extends in the vehicle transverse direction, and that partitions at least a portion of the interior of the blow-out port in the vehicle longitudinal direction; a first guide member that is provided further toward the vehicle front side than the front-rear partitioning wall, at the vehicle transverse direction outer side at the interior of the blow-out port, and that is inclined toward the vehicle transverse direction outer side while heading from the vehicle lower side toward the vehicle upper side; and a second guide member that is provided further toward the vehicle rear side than the front-rear partitioning wall, at the vehicle transverse direction outer side at the interior of the blow-out port, that is inclined toward the vehicle transverse direction outer side while heading from the vehicle lower side toward the vehicle upper side, and that has an angle of inclination with respect to a vertical direction which is the same as that of the first guide member; characterized in that a left-right partitioning wall is provided at the interior of the blow-out port, the left-right partitioning wall is provided at the vehicle transverse direction inner side with respect to a vehicle transverse direction outer side edge portion of the blow-out port, and extends along the vehicle longitudinal direction between vehicle longitudinal direction edge portions of the blow-out port, the front-rear partitioning wall is provided at the vehicle transverse direction inner side of the left-right partitioning wall, and a vehicle transverse direction end portion of the front-rear partitioning wall is connected to the left-right partitioning wall so that the front-rear partitioning wall is not provided between the vehicle transverse direction outer side edge portion of the blow-out port and the left-right partitioning wall, and the first guide member and the second guide member are disposed at the vehicle transverse direction outer side with respect to the left-right partitioning wall. a blow-out port that is provided at a position that substantially faces a windshield glass of the vehicle, at a substantially central portion in the vehicle transverse direction of an instrument panel positioned at a front portion of a passenger compartment of the vehicle, and that is configured to blow out air-conditioned air that is from an air conditioner; a front-rear partitioning wall that is provided at an interior of the blow-out port, that extends in the vehicle transverse direction, and that partitions at least a portion of the interior of the blow-out port in the vehicle longitudinal direction; a first guide member that is provided further toward the vehicle front side than the front-rear partitioning wall, at the vehicle transverse direction outer side at the interior of the blow-out port, and that is inclined toward the vehicle transverse direction outer side while heading from the vehicle lower side toward the vehicle upper side; and a second guide member that is provided further toward the vehicle rear side than the front-rear partitioning wall, at the vehicle transverse direction outer side at the interior of the blow-out port, that is inclined toward the vehicle transverse direction outer side while heading from the vehicle lower side toward the vehicle upper side, and that has an angle of inclination with respect to a vertical direction which is the same as that of the first guide member; characterized in that a left-right partitioning wall is provided at the interior of the blow-out port, the left-right partitioning wall is provided at the vehicle transverse direction inner side with respect to a vehicle transverse direction outer side edge portion of the blow-out port, and extends along the vehicle longitudinal direction between vehicle longitudinal direction edge portions of the blow-out port, the front-rear partitioning wall is provided at the vehicle transverse direction inner side of the left-right partitioning wall, and a vehicle transverse direction end portion of the front-rear partitioning wall is connected to the left-right partitioning wall so that the front-rear partitioning wall is not provided between the vehicle transverse direction outer side edge portion of the blow-out port and the left-right partitioning wall, and the first guide member and the second guide member are disposed at the vehicle transverse direction outer side with respect to the left-right partitioning wall.