The endoscope 90 has an insertion portion 9B including a rigid distal end portion 9A and a grip portion 9C disposed at the rear of the insertion portion 9B, and the rigid distal end portion 9A includes a first through hole H10. And a second through hole H40, and a laminate of a plurality of optical elements 21 to 26 inserted in the first through hole H10 and a plurality of semiconductor elements 31 to 36 including the imaging element 11 An imaging unit 10 having a first block 20 including the imaging element 11 and a second block 30 having an area in a direction orthogonal to the optical axis smaller than the first block 20； In the accommodation space S40 in which the space S20 obtained by extending the block 20 in the optical axis direction and the space S20 obtained by extending the second block 30 in the optical axis orthogonal direction overlap, the tip of the second through hole H40 Water supply and air supply which is a component inserted Some of the 40 are disposed.内視鏡９０は、硬性先端部９Ａを含む挿入部９Ｂと、前記挿入部９Ｂの後部に配設された把持部９Ｃと、を有し、前記硬性先端部９Ａに、第１の貫通孔Ｈ１０と第２の貫通孔Ｈ４０とがあり、前記第１の貫通孔Ｈ１０に挿入されている、複数の光学素子２１～２６と、撮像素子１１を含む複数の半導体素子３１～３６と、の積層体を有する撮像ユニット１０が、前記撮像素子１１を含む第１のブロック２０と、光軸直交方向の面積が前記第１のブロック２０よりも小さい第２のブロック３０と、からなり、前記第１のブロック２０を光軸方向に延長した空間Ｓ２０と前記第２のブロック３０を光軸直交方向に延長した空間Ｓ２０とが重畳している収容空間Ｓ４０に、前記第２の貫通孔Ｈ４０に先端部が挿入されている構成部材である送水送気管４０の一部が配設されている。
