There is provided an endoscope of which a tip portion of an insertion unit can be reduced in diameter. A flat surface of an extending portion of a cap body is in contact with a planar mounting surface of an outer peripheral surface of a tip portion body and a second engagement portion is engaged with a first engagement portion in an endoscope of the invention, so that the tip portion body and the cap body are connected to each other. Further, a stringy or belt-like fixing member is disposed on an outer peripheral surface of a coating member, which covers a connecting portion between the tip portion body and the cap body, in the endoscope of the invention to fix engagement between the first and second engagement portions.
