A vehicle lighting fixture comprising: a projection lens, wherein the projection lens is constituted by one or a plurality of lenses, for example by a primary lens and a secondary lens; a separator disposed behind the projection lens; and a low-beam light source that is disposed behind the separator and that is adapted to emit light for forming a low-beam light distribution pattern (P LO) by being irradiated forward through the separator and the projection lens in this order, characterised in that the separator includes an upper separator body that has a front surface and a rear surface on an opposite side thereof, and a first light guide portion that extends from a lower portion of the upper separator body toward the low-beam light source and has a first light incident surface located at a tip end thereof and faces the low-beam light source; the projection lens has a front surface and a rear surface on an opposite side thereof, and the rear surface of the projection lens has an upper light incident surface (60Ab1) facing the front surface of the upper separator body; the low-beam light source, the first light guide portion, the upper separator body, and the upper light incident surface (60Ab1) are each disposed above a reference axis passing through the focal point of the projection lens and extending in a vehicle longitudinal direction; the lower portion of the front surface of the upper separator body is in surface contact with a lower portion of the upper light incident surface (60Ab1) of the rear surface of the projection lens; a space is formed between a portion above the lower portion of the front surface of the upper separator body and a portion above the lower portion of the upper light incident surface of the rear surface of the projection lens; and the light emitted from the low-beam light source enters the first light guide portion through the first light incident surface (60Ab1), and a part of the light is directly outputted from the front surface of the upper separator body, and another part of the light is guided within the upper separator body while being repeatedly totally reflected between the front surface and the rear surface of the upper separator body and then outputted through the front surface of the upper separator body and further enters the projection lens through the upper light incident surface (60Ab1) of the projection lens to be projected by the projection lens, so that the light is used for forming the low-beam light distribution pattern (P LO). the separator includes an upper separator body that has a front surface and a rear surface on an opposite side thereof, and a first light guide portion that extends from a lower portion of the upper separator body toward the low-beam light source and has a first light incident surface located at a tip end thereof and faces the low-beam light source; the projection lens has a front surface and a rear surface on an opposite side thereof, and the rear surface of the projection lens has an upper light incident surface (60Ab1) facing the front surface of the upper separator body; the low-beam light source, the first light guide portion, the upper separator body, and the upper light incident surface (60Ab1) are each disposed above a reference axis passing through the focal point of the projection lens and extending in a vehicle longitudinal direction; the lower portion of the front surface of the upper separator body is in surface contact with a lower portion of the upper light incident surface (60Ab1) of the rear surface of the projection lens; a space is formed between a portion above the lower portion of the front surface of the upper separator body and a portion above the lower portion of the upper light incident surface of the rear surface of the projection lens; and the light emitted from the low-beam light source enters the first light guide portion through the first light incident surface (60Ab1), and a part of the light is directly outputted from the front surface of the upper separator body, and another part of the light is guided within the upper separator body while being repeatedly totally reflected between the front surface and the rear surface of the upper separator body and then outputted through the front surface of the upper separator body and further enters the projection lens through the upper light incident surface (60Ab1) of the projection lens to be projected by the projection lens, so that the light is used for forming the low-beam light distribution pattern (P LO).