An endoscope 2 that can stably transmit an optical signal is provided. The endoscope 2 includes an insertion portion 80 in which a rigid distal end portion 81, a bending portion 82 for changing a direction of the rigid distal end portion 81, and a flexible portion 83 are provided in a connected row arrangement, and an optical fiber 50 that is inserted through the insertion portion 80 and transmits an optical signal. The endoscope 2 has, in the rigid distal end portion 81, an optical transmission module 1 in which an image pickup device 90, an optical device 10 in which a light-emitting portion 11 configured to convert an electrical signal that the image pickup device 90 outputs into an optical signal is formed, and a holding member 40 that has a through hole 40H and which is disposed so that the through hole 40H is positioned over the light-emitting portion 11 are arranged. A length in the bending portion 82 of the optical fiber 50 whose distal end portion is inserted into and fixed in the through hole 40H of the holding member 40 is longer than a length L0 of the bending portion 82.
