Light (light (L1)) at peak luminous intensity in a light distribution of a first region (12a) of a light-irradiating surface (12) is sent to a first region (32a) of a target surface (32) via a first region (22a) of a reflecting surface (22). Light (light (L2)) at peak luminous intensity in a light distribution in a second region (12b) of the light-irradiating surface (12) is sent to a second region (32b) of the target surface (32) via a second region (22b) of the reflecting surface (22). An optical distance from the first region (12a) of the light-irradiating surface (12) to the first region (32a) of the target surface (32) via the first region (22a) of the reflecting surface (22) is greater than an optical distance from the second region (12b) of the light-irradiating surface (12) to the second region (32b) of the target surface (32) via the second region (22b) of the reflecting surface (22). The luminous intensity of the light (L1) is higher than the luminous intensity of the light (L2).