A light source device includes: a plurality of solid light emitting elements for emitting lights in mutually different wavelength bands a plurality of cooling means provided corresponding to the plurality of solid light emitting elements for cooling the respective solid light emitting elements A solid state light emitting element which is provided with information relating to the light quantity ratio of the plurality of solid light emitting elements and controls the individual light emission of the solid light emitting element individually and a cooling capacity of the plurality of cooling means based on a cooling ratio corresponding to the light quantity ratio And a cooling control unit that controls cooling of each of the solid state light emitting devices individually or group by group.光源装置は、互いに異なる波長帯域の光を出射する複数の固体発光素子と、前記複数の固体発光素子に対応して設けられて、前記各固体発光素子を冷却する複数の冷却手段と、前記複数の固体発光素子の光量比に関連する情報が与えられて前記固体発光素子を個別に発光制御する発光素子制御部と、前記光量比に対応した冷却比率に基づいて前記複数の冷却手段の冷却能力を制御して前記各固体発光素子を個別又はグループ毎に冷却制御する冷却制御部とを具備する。
