The present invention provides a structural unit, an endoscope and an adhering method that suppress deterioration in adhesive strength of an adhesive that adheres plural structural members that structure the endoscope. An imaging unit 68 side of an adhesive 88 is covered by a first moisture-proof coating 91, and an obverse side of the adhesive 88 is covered by a second moisture-proof coating 92. Due thereto, in autoclave sterilization processing or the like, even if moisture passes along a wire portion 86 and penetrates into the imaging unit 68, penetration of the moisture into the adhesive is suppressed by the first moisture-proof coating 91. Due thereto, deterioration in adhesive strength of the adhesive, that adheres plural structural members of the imaging unit 68, can be suppressed.
