An illumination device, comprising: a device body; a power-feeding unit arranged in a central region of the device body; a plurality of LEDs annularly arranged around the power-feeding unit, the LEDs being turned on by electric power supplied from the power-feeding unit; an optical member arranged in front of the LEDs to control distribution of the light emitted from the LEDs; characterized by further comprising a diffusing member arranged in front of the optical member to diffuse the light whose distribution is controlled by the optical member, wherein the optical member includes forwardly-bulging lens portions (32, 33) provided in alignment with the LEDs, each of the lens portions (32, 33) having a first convex portion (132a, 133a) arranged in an end portion thereof near the power-feeding unit in a first direction interconnecting each of the lens portions (32, 33) and the power-feeding unit and configured to distribute the light emitted from the corresponding LEDs toward a central region of the diffusing member; and a second convex portion (132b, 133b) arranged in the opposite end portion from the power-feeding unit in the first direction and configured to distribute the light emitted from the corresponding LEDs toward an outer edge region of the diffusing member, wherein each of the lens portions (32, 33) is configured such that the diffusivity in a region near an optical axis of the corresponding LED becomes higher than the diffusivity in other regions. a device body; a power-feeding unit arranged in a central region of the device body; a plurality of LEDs annularly arranged around the power-feeding unit, the LEDs being turned on by electric power supplied from the power-feeding unit; an optical member arranged in front of the LEDs to control distribution of the light emitted from the LEDs; characterized by further comprising a diffusing member arranged in front of the optical member to diffuse the light whose distribution is controlled by the optical member, wherein the optical member includes forwardly-bulging lens portions (32, 33) provided in alignment with the LEDs, each of the lens portions (32, 33) having a first convex portion (132a, 133a) arranged in an end portion thereof near the power-feeding unit in a first direction interconnecting each of the lens portions (32, 33) and the power-feeding unit and configured to distribute the light emitted from the corresponding LEDs toward a central region of the diffusing member; and a second convex portion (132b, 133b) arranged in the opposite end portion from the power-feeding unit in the first direction and configured to distribute the light emitted from the corresponding LEDs toward an outer edge region of the diffusing member, wherein each of the lens portions (32, 33) is configured such that the diffusivity in a region near an optical axis of the corresponding LED becomes higher than the diffusivity in other regions. a diffusing member arranged in front of the optical member to diffuse the light whose distribution is controlled by the optical member, wherein the optical member includes forwardly-bulging lens portions (32, 33) provided in alignment with the LEDs, each of the lens portions (32, 33) having a first convex portion (132a, 133a) arranged in an end portion thereof near the power-feeding unit in a first direction interconnecting each of the lens portions (32, 33) and the power-feeding unit and configured to distribute the light emitted from the corresponding LEDs toward a central region of the diffusing member; and a second convex portion (132b, 133b) arranged in the opposite end portion from the power-feeding unit in the first direction and configured to distribute the light emitted from the corresponding LEDs toward an outer edge region of the diffusing member, wherein each of the lens portions (32, 33) is configured such that the diffusivity in a region near an optical axis of the corresponding LED becomes higher than the diffusivity in other regions.