A vehicle lamp comprising: a projection lens having a first lens portion forming a first rear focal point and a second lens portion forming a second rear focal point; a light source disposed behind the projection lens and configured to emit light for forming a predetermined light distribution pattern which is a low beam light distribution; a reflector configured to reflect the light emitted from the light source toward the first rear focal point of the projection lens to form said predetermined light distribution pattern; and a first array light source and a second array light source disposed behind the projection lens and each having a plurality of semiconductor light emitting elements (51, 55) arranged in at least one row, wherein the second array light source is disposed below the first array light source, wherein: the first array light source is configured to emit light forming a first additional light distribution pattern, the light being incident on an incident surface of the first lens portion, and the second array light source is configured to emit light forming a second additional light distribution pattern, the light being incident on incident surfaces of the second lens portion, wherein the center position or maximum light intensity position of the second additional light distribution pattern formed by the second array light source overlaps with the predetermined light distribution pattern on a virtual vertical screen in front of the lamp, wherein the first array light source is disposed on a position such that the first additional light distribution pattern overlaps with the projected image on the virtual vertical screen in front of the vehicle lamp by the projection lens of the first rear focal point and its surroundings, wherein the first additional light distribution pattern is a high-beam light distribution pattern, and wherein the second array light source is disposed on a position such that the second additional light distribution pattern overlaps with the projected image on the virtual vertical screen in front of the vehicle lamp by the projection lens of the second rear focal point and its surroundings, wherein the additional light distribution patterns (P1, P2) are light distribution patterns in which light distribution patterns (P1a, P2a) of the semiconductor light emitting elements (51, 52) arranged in a row of respectively the first and second array light source (16, 17) are laterally arranged in a row. a projection lens having a first lens portion forming a first rear focal point and a second lens portion forming a second rear focal point; a light source disposed behind the projection lens and configured to emit light for forming a predetermined light distribution pattern which is a low beam light distribution; a reflector configured to reflect the light emitted from the light source toward the first rear focal point of the projection lens to form said predetermined light distribution pattern; and a first array light source and a second array light source disposed behind the projection lens and each having a plurality of semiconductor light emitting elements (51, 55) arranged in at least one row, wherein the second array light source is disposed below the first array light source, wherein: the first array light source is configured to emit light forming a first additional light distribution pattern, the light being incident on an incident surface of the first lens portion, and the second array light source is configured to emit light forming a second additional light distribution pattern, the light being incident on incident surfaces of the second lens portion, wherein the center position or maximum light intensity position of the second additional light distribution pattern formed by the second array light source overlaps with the predetermined light distribution pattern on a virtual vertical screen in front of the lamp, wherein the first array light source is disposed on a position such that the first additional light distribution pattern overlaps with the projected image on the virtual vertical screen in front of the vehicle lamp by the projection lens of the first rear focal point and its surroundings, wherein the first additional light distribution pattern is a high-beam light distribution pattern, and wherein the second array light source is disposed on a position such that the second additional light distribution pattern overlaps with the projected image on the virtual vertical screen in front of the vehicle lamp by the projection lens of the second rear focal point and its surroundings, wherein the additional light distribution patterns (P1, P2) are light distribution patterns in which light distribution patterns (P1a, P2a) of the semiconductor light emitting elements (51, 52) arranged in a row of respectively the first and second array light source (16, 17) are laterally arranged in a row.