A vehicular lamp comprising: a front-rear direction corresponding to a lengthwise direction of the vehicular lamp, a left-right direction corresponding to a width direction of the vehicular lamp and being orthogonal to the front-rear direction, and a vertical direction corresponding to a height direction of the vehicular lamp and being orthogonal to the front-rear direction and to the left-right direction; a light source configured to emit light; a reflector configured to reflect the light emitted from the light source toward a side of a vehicle; and an inner lens configured to allow the light reflected by the reflector to be projected toward the side of the vehicle, wherein: the reflector has a reflecting surface on which a plurality of reflection cuts are periodically arranged in a front-rear direction of the reflector wherein the front-rear direction of the reflector corresponds to the lengthwise direction of the vehicular lamp, the inner lens has a lens surface protruded from a surface facing the reflector so as to face the reflecting surface, the lens surface has a shape extending in the front-rear direction while being curved convexly in the vertical direction, characterized in that a radius of curvature of the lens surface in the vertical direction gradually increases from a first end side to a second end side of the lens surface in the front-rear direction. a front-rear direction corresponding to a lengthwise direction of the vehicular lamp, a left-right direction corresponding to a width direction of the vehicular lamp and being orthogonal to the front-rear direction, and a vertical direction corresponding to a height direction of the vehicular lamp and being orthogonal to the front-rear direction and to the left-right direction; a light source configured to emit light; a reflector configured to reflect the light emitted from the light source toward a side of a vehicle; and an inner lens configured to allow the light reflected by the reflector to be projected toward the side of the vehicle, wherein: the reflector has a reflecting surface on which a plurality of reflection cuts are periodically arranged in a front-rear direction of the reflector wherein the front-rear direction of the reflector corresponds to the lengthwise direction of the vehicular lamp, the inner lens has a lens surface protruded from a surface facing the reflector so as to face the reflecting surface, the lens surface has a shape extending in the front-rear direction while being curved convexly in the vertical direction, the reflector has a reflecting surface on which a plurality of reflection cuts are periodically arranged in a front-rear direction of the reflector wherein the front-rear direction of the reflector corresponds to the lengthwise direction of the vehicular lamp, the inner lens has a lens surface protruded from a surface facing the reflector so as to face the reflecting surface, the lens surface has a shape extending in the front-rear direction while being curved convexly in the vertical direction, characterized in that a radius of curvature of the lens surface in the vertical direction gradually increases from a first end side to a second end side of the lens surface in the front-rear direction.