A vehicular headlamp employing a light-emitting element such as an LED and having an improved projected light pattern. A light-emitting surface of a light-emitting system has a horizontally elongated shape when viewed in a direction orthogonal to the optical axis of the light-emitting system so as to form a light distribution pattern which is enlarged through an optical system mainly in the horizontal direction. Since the projected pattern is obtained by enlarging the horizontally elongated light source image, it is easier to design the light distribution of the lamp in comparison to a case where the light intensity distribution of the light-emitting system is rotationally symmetric.