PROBLEM TO BE SOLVED: To provide an endoscope system capable of appropriately observing a portion held to a treatment instrument of an endoscope.SOLUTION: An endoscope system includes: an endoscope device having a portion 60 to be inserted into a living body, and treatment instruments 62 and 63 disposed in the portion 60 for holding a subject (a living tissue) H and an optical acoustic measuring device including light emitting means 67 and 68 for emitting light of such wavelength as to be absorbed inside the subject H to the subject H, and an acoustic wave detection means 11 for detecting an acoustic wave generated from the subject H with the emitted light, for measuring the subject H based on an acoustic wave detection signal output from the acoustic wave detection means 11. The light emitting means 67, 68, and the acoustic wave detection means 11 are mounted in such a state as to face the subject H side held to the treatment instruments 62 and 63.COPYRIGHT: (C)2013,JPO&INPIT【課題】内視鏡の処置具に保持した部分を良好に観察可能な内視鏡システムを得る。【解決手段】生体内に挿入される部分60を有し、この部分60に、被検体(生体組織)Hを保持する処置具62、63が配設されてなる内視鏡装置と、被検体Hにその内部で吸収される波長の光を照射する光照射手段67、68と、前記光の照射により被検体Hから発せられた音響波を検出する音響波検出手段11とを備え、音響波検出手段11が出力した音響波検出信号に基づいて被検体Hを計測する光音響計測装置とからなる内視鏡システムであって、光照射手段67、68および音響波検出手段11を、処置具62、63に保持された被検体H側を向く状態にして取り付ける。【選択図】図3
