VEHICLE HEADLIGHT

A vehicle headlight (1) includes a first light source unit (20), a second light source unit (40), and a controller (CO), in which the controller (CO) moves at least an upper edge of a low beam light distribution pattern (101) upward in a case of performing temperature derating on the second light source unit (40) based on a temperature of the second light source unit (40) in a state where a high beam light distribution pattern (105) is formed.