An endoscope has an imaging unit at a tip portion of an insertion unit to be inserted into a body cavity, the imaging unit includes: a solid-state imaging device which performs photoelectric conversion on an optical image formed on a photodetecting surface thereof； a circuit board having a connection surface which is opposed to a surface, opposite to the photodetecting surface and formed with terminals, of the imaging device and which serves for electrical connection to the terminals； and a case member which covers part of the imaging device and part of the circuit board, the circuit board has a wide portion and a narrow portion that are different in length in a width direction perpendicular to a longitudinal direction of the insertion unit, and the case member is formed with first cuts in such a range as to correspond to the wide portion in the longitudinal direction.
