A vehicle lamp adapted to be mounted at a lateral end of a front end portion of a vehicle, comprising: a housing; a light-transmitting member attached to the housing so as to form a lamp chamber; a forward illumination light source disposed in the lamp chamber and configured to emit light in a forward direction of the vehicle through the light-transmitting member; and a first vent member and a second vent member, wherein the lamp chamber comprises a first lamp chamber and a second lamp chamber, the first lamp chamber being located in the forward direction of the vehicle from a first reference plane and inwardly of a second reference plane in a width direction of the vehicle and the second lamp chamber being located in a rearward direction of the vehicle from the first reference plane and outwardly of the second reference plane in the width direction of the vehicle, when a plane perpendicular to an optical axis of the forward illumination light source and passing a forward end of the forward illumination light source is defined as the first reference plane and a plane including the optical axis and extending in a vertical direction is defined as the second reference plane, the light-transmitting member comprises a front part and a rear part, the front part being located in the forward direction from the first reference plane and facing the first lamp chamber, the rear part being located in the rearward direction from the first reference plane and facing the second lamp chamber, the first vent member is attached to a first opening portion provided in a region of the housing facing the first lamp chamber, the second vent member is attached to a second opening portion provided in a region of the housing facing the second lamp chamber, the first vent member and the second vent member each comprise a porous resin membrane, and an air permeability value of the first vent member is higher than an air permeability value of the second vent member when the air permeability value of each of the first and second vent members is determined by measuring a volume of air permeated per unit area of the porous resin membrane by Method A (Frazier method) for air permeability measurement according to JIS L 1096 and then multiplying the measured volume of air by an air-permeable area of the porous resin membrane. a housing; a light-transmitting member attached to the housing so as to form a lamp chamber; a forward illumination light source disposed in the lamp chamber and configured to emit light in a forward direction of the vehicle through the light-transmitting member; and a first vent member and a second vent member, wherein the lamp chamber comprises a first lamp chamber and a second lamp chamber, the first lamp chamber being located in the forward direction of the vehicle from a first reference plane and inwardly of a second reference plane in a width direction of the vehicle and the second lamp chamber being located in a rearward direction of the vehicle from the first reference plane and outwardly of the second reference plane in the width direction of the vehicle, when a plane perpendicular to an optical axis of the forward illumination light source and passing a forward end of the forward illumination light source is defined as the first reference plane and a plane including the optical axis and extending in a vertical direction is defined as the second reference plane, the light-transmitting member comprises a front part and a rear part, the front part being located in the forward direction from the first reference plane and facing the first lamp chamber, the rear part being located in the rearward direction from the first reference plane and facing the second lamp chamber, the first vent member is attached to a first opening portion provided in a region of the housing facing the first lamp chamber, the second vent member is attached to a second opening portion provided in a region of the housing facing the second lamp chamber, the first vent member and the second vent member each comprise a porous resin membrane, and an air permeability value of the first vent member is higher than an air permeability value of the second vent member when the air permeability value of each of the first and second vent members is determined by measuring a volume of air permeated per unit area of the porous resin membrane by Method A (Frazier method) for air permeability measurement according to JIS L 1096 and then multiplying the measured volume of air by an air-permeable area of the porous resin membrane.