An endoscope apparatus includes: a long insertion portion that is inserted into an examination object an illumination portion provided at a distal end portion of the insertion portion, that irradiates illumination light at the examination object an image pickup portion provided inside the distal end portion, that picks up reflected light captured in the insertion portion and a heat radiating member that radiates heat emitted from at least one of the illumination portion and the image pickup portion. A distal end of the heat radiating member is disposed on a further proximal end side of the insertion portion than a maximum external diameter portion of the image pickup portion within the distal end portion. Therefore, not only can heat be radiated from the distal end portion of the insertion portion, but the distal end portion of the insertion portion can also be formed with a narrow diameter.
