Provided is an endoscope in which heat generation at the distal end portion is reduced. An illumination system (103) has a light guide (102a, 102b) and at least one illumination lens (101a, 101b), and has an imaging system (104) and an illumination system (103) The imaging system (104) has an objective lens unit (LU) and an imaging device (105), and a direction along a long side of the imaging device (105) is a first direction, and an imaging device ) Is a second direction, the illumination system (103) is arranged at a position shifted in the second direction with respect to the imaging system (104), and the conditional expressions (1), (2) is satisfied. 1.35
