PROBLEM TO BE SOLVED: To provide an endoscope system capable of selectively using a plurality of types of endoscopes with different functions that can reduce man-hour necessary for a development of each endoscope.SOLUTION: The endoscope system according to the present invention which can selectively use a plurality of types of endoscopes with different functions includes: a distal end hard member that is used in common for the plurality of types of endoscopes and disposed at a distal end of an insertion portion of each of the plurality of types of endoscopes and imaging units with different configurations each of which is mechanically coupled with the distal end hard member and is applied to each of the plurality of types of endoscopes. In the plurality of types of endoscopes, the coupling configurations of the distal end hard member and the imaging units are the same.COPYRIGHT: (C)2014,JPO&INPIT【課題】機能が異なる複数種類の内視鏡を選択的に使用可能な内視鏡システムにおいて、それぞれの内視鏡の開発に必要な工数を低減する。【解決手段】本発明は、機能が異なる複数種類の内視鏡を選択的に使用可能な内視鏡システムにおいて、前記複数種類の内視鏡間で共通して使用され、前記複数種類の内視鏡のそれぞれの挿入部の先端部に配設される先端硬質部材と、前記先端硬質部材と機械的に連結されるとともに、前記複数種類の内視鏡におけるそれぞれに適用される、構成が異なる撮像ユニットと、を具備しており、前記複数種類の内視鏡において、前記先端硬質部材及び前記撮像ユニットの連結の構造を同一構成とした。【選択図】図7