Patent ID: 8790249

Claim:
An endoscope comprising: a distal end portion body disposed in a distal end portion of an insertion section and formed of a rigid material, wherein the distal end portion body defines a first through hole and a second through hole different from the first through hole; a distal end portion cover for covering the distal end portion body, the distal end portion cover being disposed in the distal end portion of the insertion section and formed of an insulating material; and an optical member arranged to a distal end side of the first through hole of the distal end portion body, wherein the optical member has a circumferential surface, wherein at least a portion of the optical member is exposed outside of the endoscope, wherein an entire circumference of a proximal end side portion of the circumferential surface in an axial direction of the optical member contactably faces the distal end portion body, wherein a distal end side portion of the circumferential surface in the axial direction of the optical member contactably faces the distal end portion cover, and wherein the proximal end side portion of the circumferential surface contactably facing the distal end portion body is bonded to the distal end portion body by metal welding, and the distal end side portion of the circumferential surface contactably facing the distal end portion cover is bonded to the distal end portion cover by adhesion.