PROBLEM TO BE SOLVED: To provide an endoscope apparatus that can secure a large light receiving area for imaging and spectrometry without making a light receiving surface of an imaging element large and that allows not only imaging but also highly accurate spectrometry in a wide wavelength area by one imaging element.SOLUTION: An endoscope apparatus comprises: an imaging element 25 having a light receiving surface 25a that is shared for imaging of an observation object portion in a body lumen and spectrometry of a measurement object portion in the body lumen a spectral optical system 26 including a diffraction grating and/or a spectral prism for dispersing light received from the measurement object portion a first optical path P1 having the spectral optical system a second optical path P2 without having the spectral optical system an incidence part for causing received light to be made incident on the light receiving surface 25a via a selected optical path and an optical path selection part 28 that selects the second optical path P2 when the observation object portion is irradiated with illumination light and selects the first optical path P1 when the measurement object portion is irradiated with excitation light.COPYRIGHT: (C)2014,JPO&INPIT【課題】撮像素子の受光面を大きくすることなく撮像用及び分光測定用のための受光面積を大きく確保することができ、1つの撮像素子によって、撮像だけでなく、広い波長範囲において精度良く分光測定も行うことができる内視鏡装置を提供すること。【解決手段】内視鏡装置は、体内管腔の観察対象部位の撮像及び体内管腔の測定対象部位の分光測定に共用される受光面25aを有する撮像素子25と、測定対象部位からの受光光を分光する回折格子又は分光プリズムを含む分光光学系26と、分光光学系を有する第1の光路P1と、分光光学系を有しない第2の光路P2と、を含み、選択された光路を介して受光面25aに受光光を入射させる入射部と、観察対象部位の照明光が照射されるときには第2の光路P2を選択し、測定対象部位の励起光が照射されるときには第1の光路P1を選択する光路選択部28と、を有する。【選択図】図1
