PROBLEM TO BE SOLVED: To provide an endoscope apparatus which uses an imaging unit with two imaging elements laminatingly mounted thereon to enable simultaneous observation of reflection from a subject caused by white light and reflection from the subject caused by infrared light with a desired performance attained.SOLUTION: Used is an imaging unit 21 on which are mounted laminatingly, from the side receiving light from a subject, a color filter 93 allowing infrared light to transmit therethrough, a first imaging element 83 photoelectrically converting white light, and a second imaging element 87 photoelectrically converting infrared light which has transmitted through the color filter 93 and the first imaging element 83, such that the reflection of white light from the subject and the reflection of infrared light from the subject are observed simultaneously. A timing control unit 69 causes a first infrared light source K2 and a second infrared light source K3 to illuminate at least during an illuminating period of a white light source K1 to allow that an image signal from the second imaging element 87 is read simultaneously with the reading of an imaging signal from the first imaging element 83 during at least a part of a period during which the image signal from the first imaging element 83 is read.SELECTED DRAWING: Figure 7【課題】２つの撮像素子が積層配置された撮像部を用いた白色光による被検体からの反射光と赤外光による同被検体からの反射光の同時観察を所望の性能を満たして実行可能な内視鏡装置を提供すること。【解決手段】被検体からの光の入射側からの順に、赤外光を透過する色フィルター９３、白色光を光電変換する第１撮像素子８３、色フィルター９３及び第１撮像素子８３を透過した赤外光を光電変換する第２撮像素子８７が積層配置された撮像部２１を用いて、被検体からの白色光の反射光と同被検体からの赤外光の反射光の同時観察を行う。タイミング制御部６９は、第１赤外光用光源Ｋ２及び第２赤外光用光源Ｋ３を、少なくとも白色光用光源Ｋ１の発光期間には発光させ、第２撮像素子８７からの画像信号の読み出しを、第１撮像素子８３からの画像信号の読み出し期間の少なくとも一部の読み出し期間に、第１撮像素子８３からの画像信号の読み出しと同時に行う。【選択図】図７
