The imaging unit 1 includes a plurality of the objective lens unit 2 having an optical member 11-18,22-24 and a plurality of lens frames 11 and 21, the imaging device 41 and at least one optical lens for receiving light for guiding light an image sensor unit 3 having an image pickup device holding frame 45 that holds the 44, is bonded and fixed by applying the first adhesive to the first fitting surface of the lens frame 11, 21 between which is provided on the objective lens unit 2 that the first frame fixing portion 4, the second fitting of having a larger fitting area than the mating area of the first fitting surface a fitting surface of the second lens frame 21 and the image pickup device holding frame 45 glass transition temperature is lower than the first adhesive to the mating surface comprises a second frame fixing portions 5 are bonded and fixed by applying a second adhesive agent撮像ユニット1は、光を導くための複数の光学部材11-18、22-24及び複数のレンズ枠11、21を有する対物レンズユニット2と、光を受光する撮像素子41及び少なくとも一つの光学レンズ44を保持する撮像素子保持枠45を有する撮像素子ユニット3と、対物レンズユニット2に設けられたレンズ枠11、21同士の第1の嵌合面に第1接着剤を塗布して接着固定される第1枠固定部4と、第2レンズ枠21と撮像素子保持枠45との嵌合面であって第1の嵌合面の嵌合面積よりも大きな嵌合面積を有する第2の嵌合面に第1接着剤よりガラス転移温度が低い、第2接着剤を塗布して接着固定される第2枠固定部5と、を具備する。
