And observation by endoscope, in performing the measurement by the measuring probe of the optical measuring device, eliminating the effects of the endoscope observation light for measurement by the measuring probe, and both high-accuracy measurement possible to provide an optical measuring apparatus and endoscope system capable of performing. The endoscope system 1 includes an endoscope light source device 5, a light receiving unit 322 for receiving through the measurement probe 31, on the basis of the result of the light receiving portion 322 is received, the calculation unit 327a for measuring the properties of the object , a control unit 46 for switching the wavelength of the endoscope light source device endoscope 5 as the wavelength of the measuring light wavelength and the light source unit 321 of the observation light emitted emitting different light source device 5 or the light source unit 321, the provided.内視鏡による観察と、光学測定装置の測定プローブによる測定とを行う際に、測定プローブによる測定に対して内視鏡の観察光の影響をなくし、精度の高い測定を両立して行うことができる光学測定装置および内視鏡システムを提供する。内視鏡システム1は、内視鏡光源装置5と、測定プローブ31を介して受光する受光部322と、受光部322が受光した結果に基づいて、対象物の特性を測定する演算部327aと、内視鏡光源装置5が出射する観察光の波長と光源部321が出射する測定光の波長とが異なるように内視鏡光源装置5または光源部321の波長を切り換える制御部46と、を備える。
