PROBLEM TO BE SOLVED: To provide an endoscope system which includes a CMOS-type imaging element for reading out a signal by one pixel array in order and a semiconductor light source and which can obtain sufficient light amount, and a control method of the same.SOLUTION: A light source part includes a first light source on which a plurality of first semiconductor light-emitting elements emitting a first light are provided. An endoscope includes a CMOS-type imaging element in which a plurality of pixel arrays are configured and which reads out a signal by one pixel array in order. An image control part drives the CMOS-type imaging element per a frame period T, and performs a read-out of a signal by one pixel array in order within each of the frame period T. A light source control part turns off light of the plurality of first semiconductor light-emitting elements during a signal read-out period (t3 - t0) of the CMOS-type imaging element, and turns on the light by applying a drive current of a non-linear region to at least one of the plurality of first semiconductor light-emitting elements during a light receivable period (t1 - t3) in which the plurality of pixel arrays can receive light.SELECTED DRAWING: Figure 17【課題】１画素行ずつ順に信号読み出しを行うＣＭＯＳ型撮像素子と、半導体光源とを備え、十分な光量を得ることを可能とする内視鏡システム及びその制御方法を提供する。【解決手段】光源部は、第１光を発する複数の第１半導体発光素子が設けられた第１光源を有する。内視鏡は、複数の画素行が構成され、１画素行ずつ順に信号読み出しを行うＣＭＯＳ型撮像素子を有する。撮像制御部は、ＣＭＯＳ型撮像素子を１フレーム周期ＴCごとに駆動させ、各フレーム周期ＴC内で１画素行ずつ順に信号読み出しを行わせる。光源制御部は、ＣＭＯＳ型撮像素子の信号読み出し期間（ｔ３～ｔ０）に複数の第１半導体発光素子を消灯させ、複数の画素行が受光可能である受光可能期間（ｔ１～ｔ３）に、複数の第１半導体発光素子のうち少なくとも１つの第１半導体発光素子に、非線形領域の駆動電流を印加することにより点灯させる。【選択図】図１７
