PROBLEM TO BE SOLVED: To provide a medical lighting device effective during diagnosing and treating, in particular, an affected part such as the ear, the nose, the throat or the oral cavity of the head of a person while irradiating the affected part with light.SOLUTION: Light source support members 43 are provided to protrude from respective side portions of a head support 13 of a diagnostic chair 12, and a floodlight 20 including an LED light source 25 is provided in each of the light source support members 43. The floodlight 20 includes a heat sink 24 provided on a bottom of a vessel 23, the LED light source 25 is mounted on this heat sink 24, a housing 21 is fitted into a storage portion of the vessel 23, a diffusion plate 27 is provided on a light-emitting surface of this housing 21, the vessel 23 is a shallow circular vessel having heat conductivity, the housing 21 is formed out of silicon rubber, and the vessel 23 is fixedly attached to this housing 21.COPYRIGHT: (C)2015,JPO&INPIT【課題】特に人間の頭部の耳、鼻、咽喉、口腔などの患部に光を照射して診察したり、治療したりするときに有効な医用照明装置を提供すること。【解決手段】診察椅子12における支頭部13の側部に突出して光源支持部材43を設け、この光源支持部材43に、LED光源25を有する照明灯20を設け、前記照明灯20は、容器23の底部に放熱板24を設け、この放熱板24にLED光源25を搭載し、前記容器23の収納部にハウジング21を嵌め込み、このハウジング21の発光面に拡散板27を設け、前記容器23は、熱伝導性を有する底の浅い円形容器であって、前記ハウジング21は、シリコーンゴムからなり、このハウジング21を前記容器23に固定的に取り付ける。【選択図】図1