An endoscope includes a distal end portion body 31 formed of a metal, a distal end portion cover 32 formed of an insulating resin to cover the distal end portion body 31, and a cover lens 25 disposed at a position at which the circumferential surface of the cover lens 25 is contactable with both the distal end portion body 31 and the distal end portion cover 32. In the above, the proximal end side of the circumferential surface of the cover lens 25 is bonded to the distal end portion body 31 by soldering along the circumferential direction. Meanwhile, the distal end side of the circumferential surface of the cover lens 25 is bonded to the distal end portion cover 32 by adhesion along the circumferential direction. Each of bonding surfaces of the cover lens 25 and the distal end portion body 31 is previously formed with a metal film for improving the flow of a liquid solder.
