The illumination device 1 is provided on the main body 3 provided with the band-like portion 3a mounted along the circumferential direction of the head of the wearer, and the main body 3, and when mounted on the wearer, in the forehead area of the wearer It has the storage case 5 located, and the light source unit 20 which comprises the LED board integrated in the storage case 5 and in which several LED light sources were mounted. The light source unit 20 includes a condensing lens that condenses light emitted from a plurality of LED light sources, a reflection mirror that deflects the light emitted from the condensing lens and reflects the light toward a patient's affected area, and an LED substrate A heat sink 70 dissipates heat and extends from the forehead area of the wearer to the top area of the head.照明装置１は、装着者の頭部の周方向に沿うように装着される帯状部３ａを備えた本体３と、本体３に設けられ、装着者に装着された際、装着者の額領域に位置する収納ケース５と、収納ケース５内に組み込まれ、複数のＬＥＤ光源が実装されたＬＥＤ基板を具備する光源ユニット２０と、を有する。光源ユニット２０は、複数のＬＥＤ光源から射出される光を集光する集光レンズと、集光レンズから射出する光を偏向して患者の患部に向けて反射する反射ミラーと、ＬＥＤ基板からの発熱を放熱し、装着者の額領域から頭頂領域に向けて延びる放熱板７０とを有する。
