As for the endoscope device of this invention, observation magnification ratio dispersing converting the light of wide band light and the visible optical territory which include the endoscope and the visible optical territory which have magnification change possible objective optical system observation magnification ratio changing gradually narrow band light of the plural zones which can and, selectively observation magnification ratio of the radiation possible light equipment and objective optical system on the basis of the observation magnification ratio modification indication section and the magnification change indication which do the magnification change indication in order gradually it increases or to decrease, or, the occasion where it inspects the fact that it reaches to specified observation magnification ratio, from the light equipment radiation the light which is done from light of one sideThe mode change section which is changed to other light and, it possesses.本発明の内視鏡装置は、観察倍率を変倍可能な対物光学系を備えた内視鏡と、可視光領域を含む広帯域光と、可視光領域の光を離散化して得られる複数の帯域の狭帯域光と、を選択的に出射可能な光源装置と、対物光学系の観察倍率を次第に増加または減少させるための変倍指示を行う観察倍率変更指示部と、変倍指示に基づき、観察倍率が次第に変化して所定の観察倍率に達したことを検知した際に、光源装置から出射される光を一方の光から他方の光へ切り替えるモード切替部と、を有する。
