An endoscope includes: a distal end rigid member to which an observation optical portion is fixedly provided a distal end cover fixed to the distal end rigid member in an integrated manner, and including an illuminating window portion and a light-emitting device installing hole a light-emitting device arranged in the light-emitting device installing hole and including a light-emitting portion that faces the illuminating window portion included in the distal end cover, and a conductive portion opposed to the opening of the light-emitting device installing hole a substrate having thermal conductance and combining as a heat dissipating portion, and connected to the conductive portion of the light-emitting device, a power supply cable being connected thereto and a heat dissipation member having thermal conductance, an end side of which being connected to the substrate and another end side projecting relative to the substrate to dissipate heat conducted to the substrate.
