The endoscope illumination device includes a light source that outputs primary light, a light guide member (26) that guides primary light, and a light conversion member (62) that converts primary light to secondary light. Have. The light guide member (26) has a light guide member end face (32) through which the primary light exits from the light guide member, and the light conversion member (62) passes the primary light through it. The light conversion member end face (64) that enters the conversion member is provided, and the light guide member end face (32) and the light conversion member end face (64) are arranged opposite to each other and spaced apart from each other. The incident angle of light emitted from the intersection of the optical axis of the light guide member (26) and the light conversion member end surface (64) at the light guide member end surface (32) and incident on the light guide member end surface (32) is determined by the light guide. The light guide member (26) and the light conversion member (62) are arranged in a relative positional relationship such that the incident angle of light that can be guided by the member (26) is equal to or greater.内視鏡用照明装置は、１次光を出力する光源と、１次光を導光する導光部材（２６）と、１次光を２次光に変換する光変換部材（６２）とを有する。導光部材（２６）は、それを通って１次光が導光部材から出射する導光部材端面（３２）を有し、光変換部材（６２）は、それを通って１次光が光変換部材に入射する光変換部材端面（６４）を有し、導光部材端面（３２）と光変換部材端面（６４）は互いに対向して離間して配置されている。導光部材端面（３２）における導光部材（２６）の光軸と光変換部材端面（６４）との交点から出射し、導光部材端面（３２）に入射する光の入射角が、導光部材（２６）が導光することが可能である光の入射角以上となるような相対位置関係で導光部材（２６）と光変換部材（６２）が配置されている。
