Lamp unit for vehicular headlamp

A lamp unit for a vehicular headlamp, comprising:

• a projection lens that is arranged so as to have an optical axis extending in a vehicle longitudinal direction;
• a light-emitting element that is a light source and that is arranged on a rear side with respect to a rear focal point of the projection lens;
• and
• a reflector that is formed so that a longitudinal section of the reflector has an elliptical shape that includes at least part of an ellipse having a first focal point at a center of light emission of the light-emitting element and a second focal point at the rear focal point of the projection lens, wherein the reflector is arranged so as to cover the light-emitting element and reflects irradiated light toward the projection lens, the irradiated light being light irradiated from the light-emitting element, wherein
• a major axis of the ellipse, passing through the first focal point and the second focal point, is inclined with respect to the optical axis.