A partially aluminized lens for an automotive lamp, which is set in front of an automotive lamp light source , comprising: a plano-convex lens including a light-incident surface and a light-emitting surface for shaping light from the light source to a main light shape (F1); and a reflection surface for shaping light from the light source to an auxiliary light shape (F2); characterized in that : the reflection surface is formed by partial aluminization on a reflection frame integrally formed with the plano-convex lens ; a transitional region is arranged at a connection of the plano-convex lens and the reflection frame ; through the light-incident surface of the plano-convex lens , the reflection surface of the reflection frame and the transitional region , the light from the light source is shaped to the main light shape (F1) with a light-dark boundary (F3) and a range of illumination of 35 degrees to 45 degrees of an inner side, and 65 degrees to 75 degrees of an outer side of an automobile, and light from the light source is shaped to the auxiliary light shape (F2) with the light-dark boundary (F3) with inflection points, and with a range of illumination of both 15 degrees to 25 degrees of the inner side and the outer side of the automobile. a plano-convex lens including a light-incident surface and a light-emitting surface for shaping light from the light source to a main light shape (F1); and a reflection surface for shaping light from the light source to an auxiliary light shape (F2); characterized in that : the reflection surface is formed by partial aluminization on a reflection frame integrally formed with the plano-convex lens ; a transitional region is arranged at a connection of the plano-convex lens and the reflection frame ; through the light-incident surface of the plano-convex lens , the reflection surface of the reflection frame and the transitional region , the light from the light source is shaped to the main light shape (F1) with a light-dark boundary (F3) and a range of illumination of 35 degrees to 45 degrees of an inner side, and 65 degrees to 75 degrees of an outer side of an automobile, and light from the light source is shaped to the auxiliary light shape (F2) with the light-dark boundary (F3) with inflection points, and with a range of illumination of both 15 degrees to 25 degrees of the inner side and the outer side of the automobile. the reflection surface is formed by partial aluminization on a reflection frame integrally formed with the plano-convex lens ; a transitional region is arranged at a connection of the plano-convex lens and the reflection frame ; through the light-incident surface of the plano-convex lens , the reflection surface of the reflection frame and the transitional region , the light from the light source is shaped to the main light shape (F1) with a light-dark boundary (F3) and a range of illumination of 35 degrees to 45 degrees of an inner side, and 65 degrees to 75 degrees of an outer side of an automobile, and light from the light source is shaped to the auxiliary light shape (F2) with the light-dark boundary (F3) with inflection points, and with a range of illumination of both 15 degrees to 25 degrees of the inner side and the outer side of the automobile. <EOS>