An illumination unit (1A, 3A, 4A, 5A, 6A) comprising: one or more light sources (10A, 10B, 10C, 10D), each including a solid-state light-emitting device configured to emit light from a light emission region including a single or a plurality of light-emitting spots (11B, 11Br, 11Bg, 11Bb), the solid-state light-emitting device including a single chip or a plurality of chips each emitting a light beam, wherein three or more of the light-emitting spots (11B, 11Br, 11Bg, 11Bb) are provided within the whole of one or more light sources (10A, 10B, 10C, 10D), configured to allow the whole of one or more light sources (10A, 10B, 10C, 10D) to emit light beams in two or more wavelength bands different from one another, one or more of the chips in the whole of one or more light sources (10A, 10B, 10C, 10D) include a laser diode, wherein the illumination unit (1A, 3A, 4A, 5A, 6A) further comprises an optical member (20A, 20B, 20C, 40) having a minor axis and a major axis, and adapted to allow incident light from the solid-state light-emitting device to pass therethrough, wherein a direction of a minor axis of a far field pattern in light emitted from each of the light-emitting spots (11B, 11Br, 11Bg, 11Bb) is adapted to substantially agree with a direction of the minor axis of the optical member (20A, 20B, 20C, 40) in a plane perpendicular to an optical axis of the optical member (20A, 20B, 20C, 40), wherein the optical member (20A, 20B, 20C, 40) includes one or more traveling-direction angle conversion device (20A, 20B, 20C) each converting a traveling-direction-angle of the light entering from the solid-state light-emitting device, characterized in that the optical member further comprises: an integrator having a minor axis and a major axis and adapted to uniformalize illumination distribution in a predetermined illumination region which is to be illuminated by light from the traveling-direction angle conversion device (20A, 20B, 20C), wherein the direction of the minor axis of the FFP is adapted to substantially agree with a direction of a minor axis of the integrator in a plane perpendicular to an optical axis of the integrator. one or more light sources (10A, 10B, 10C, 10D), each including a solid-state light-emitting device configured to emit light from a light emission region including a single or a plurality of light-emitting spots (11B, 11Br, 11Bg, 11Bb), the solid-state light-emitting device including a single chip or a plurality of chips each emitting a light beam, wherein three or more of the light-emitting spots (11B, 11Br, 11Bg, 11Bb) are provided within the whole of one or more light sources (10A, 10B, 10C, 10D), configured to allow the whole of one or more light sources (10A, 10B, 10C, 10D) to emit light beams in two or more wavelength bands different from one another, one or more of the chips in the whole of one or more light sources (10A, 10B, 10C, 10D) include a laser diode, wherein the illumination unit (1A, 3A, 4A, 5A, 6A) further comprises an optical member (20A, 20B, 20C, 40) having a minor axis and a major axis, and adapted to allow incident light from the solid-state light-emitting device to pass therethrough, wherein a direction of a minor axis of a far field pattern in light emitted from each of the light-emitting spots (11B, 11Br, 11Bg, 11Bb) is adapted to substantially agree with a direction of the minor axis of the optical member (20A, 20B, 20C, 40) in a plane perpendicular to an optical axis of the optical member (20A, 20B, 20C, 40), wherein the optical member (20A, 20B, 20C, 40) includes one or more traveling-direction angle conversion device (20A, 20B, 20C) each converting a traveling-direction-angle of the light entering from the solid-state light-emitting device, characterized in that the optical member further comprises: an integrator having a minor axis and a major axis and adapted to uniformalize illumination distribution in a predetermined illumination region which is to be illuminated by light from the traveling-direction angle conversion device (20A, 20B, 20C), wherein the direction of the minor axis of the FFP is adapted to substantially agree with a direction of a minor axis of the integrator in a plane perpendicular to an optical axis of the integrator.