A lens body for a vehicular lighting fixture, the lens body comprising: a first lens unit configured to form a first light distribution pattern (P Lo) which includes a first cut-off line; and a second lens unit (66 L1) configured to form a second light distribution pattern (P L1) which includes a second cut-off line, wherein the first lens unit is a lens unit which is disposed in front of a first light source (14 Lo), and is configured as a lens unit which includes a rear end portion (12A1aa) and a front end portion (12A2bb), and forms the first light distribution pattern (P Lo) which includes the first cut-off line when light from the first light source (14 Lo) which entered the first lens unit is emitted from the front end portion (12A1aa) of the first lens unit and is irradiated forward, wherein the second lens unit (66 L1) is a lens unit which is disposed in front of a second light source (14 ADB), and is configured as a lens unit which includes a rear end portion and a front end portion, and forms the second light distribution pattern (P L1) which includes the second cut-off line when light from the second light source (14 ADB) which entered the second lens unit (66 L1) is emitted from the front end portion of the second lens unit (66 L1) and is irradiated forward, and wherein the first lens unit and the second lens unit (66 L1) are integrally molded so that the relative positional relationship between the first light distribution pattern (P Lo) and the second light distribution pattern (P L1) becomes a predetermined positional relationship, characterized in that the first lens unit includes a lower reflection surface disposed between the rear end portion (12A1aa) and the front end portion (12A2bb) thereof, the rear end portion (12A1aa) of the first lens unit includes an entrance surface, a tip portion of the lower reflection surface includes a shade, and the entrance surface, the lower reflection surface and the front end portion (12A2bb) of the first lens unit constitute an optical system configured to form the first light distribution pattern (P Lo) which includes, on the upper edge thereof, the first cut-off line specified by the shade of the lower reflection surface, when light partially shielded by the shade of the lower reflection surface, and light internally reflected by the lower reflection surface, out of the light from the first light source (14 Lo) which entered the first lens unit through the entrance surface, are emitted from the front end portion (12A2bb) of the first lens unit and are irradiated forward. a first lens unit configured to form a first light distribution pattern (P Lo) which includes a first cut-off line; and a second lens unit (66 L1) configured to form a second light distribution pattern (P L1) which includes a second cut-off line, wherein the first lens unit is a lens unit which is disposed in front of a first light source (14 Lo), and is configured as a lens unit which includes a rear end portion (12A1aa) and a front end portion (12A2bb), and forms the first light distribution pattern (P Lo) which includes the first cut-off line when light from the first light source (14 Lo) which entered the first lens unit is emitted from the front end portion (12A1aa) of the first lens unit and is irradiated forward, wherein the second lens unit (66 L1) is a lens unit which is disposed in front of a second light source (14 ADB), and is configured as a lens unit which includes a rear end portion and a front end portion, and forms the second light distribution pattern (P L1) which includes the second cut-off line when light from the second light source (14 ADB) which entered the second lens unit (66 L1) is emitted from the front end portion of the second lens unit (66 L1) and is irradiated forward, and wherein the first lens unit and the second lens unit (66 L1) are integrally molded so that the relative positional relationship between the first light distribution pattern (P Lo) and the second light distribution pattern (P L1) becomes a predetermined positional relationship, characterized in that the first lens unit includes a lower reflection surface disposed between the rear end portion (12A1aa) and the front end portion (12A2bb) thereof, the rear end portion (12A1aa) of the first lens unit includes an entrance surface, a tip portion of the lower reflection surface includes a shade, and the entrance surface, the lower reflection surface and the front end portion (12A2bb) of the first lens unit constitute an optical system configured to form the first light distribution pattern (P Lo) which includes, on the upper edge thereof, the first cut-off line specified by the shade of the lower reflection surface, when light partially shielded by the shade of the lower reflection surface, and light internally reflected by the lower reflection surface, out of the light from the first light source (14 Lo) which entered the first lens unit through the entrance surface, are emitted from the front end portion (12A2bb) of the first lens unit and are irradiated forward.