A vehicular lamp comprising: a front-rear direction (X) corresponding to a lengthwise direction of the vehicular lamp , a left-right direction (Y) corresponding to a width direction of the vehicular lamp and being orthogonal to the front-rear direction (X), and a vertical direction (Z) corresponding to a height direction of the vehicular lamp and being orthogonal to the front-rear direction (X) and to the left-right direction (Y); a light source configured to emit light (L); a reflector configured to reflect the light (L) emitted from the light source toward a side of a vehicle; and an inner lens configured to allow the light (L) 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 (X) 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 (X) corresponding to a lengthwise direction of the vehicular lamp , a left-right direction (Y) corresponding to a width direction of the vehicular lamp and being orthogonal to the front-rear direction (X), and a vertical direction (Z) corresponding to a height direction of the vehicular lamp and being orthogonal to the front-rear direction (X) and to the left-right direction (Y); a light source configured to emit light (L); a reflector configured to reflect the light (L) emitted from the light source toward a side of a vehicle; and an inner lens configured to allow the light (L) 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 (X) 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 (X) 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. <EOS>