PROBLEM TO BE SOLVED: To provide an endoscope insertion part allowing facilitation of assembling work, and having high component reuse rate after disassembling work, and to provide a joining method for the same.SOLUTION: A curve piece 20B and a connection tube 57A are joined by use of clips 61, 62. The curve piece 20B is formed with first connecting through holes 64a, 64b. The connection tube 57A is formed with second connecting through holes 69a, 69b arranged in positions communicating with the first connecting through holes 64a, 64b. The clip 62 has an elastic part 74, penetration parts 75a, 75b, and pulling-out prevention parts 76a, 76b, the elastic part 74 is arranged along an outer circumferential face 67a of the connection tube 57A, the penetration part 75a and the penetration part 75b penetrate the first and second connecting through holes 64a, 64b, 69a, 69b, and the pulling-out prevention parts 76a, 76b are arranged along an inner circumferential face of the curve piece 20B.COPYRIGHT: (C)2014,JPO&INPIT【課題】組立作業を容易にすることを可能とし、且つ分解作業後の部品再利用率の高い内視鏡挿入部及びその接合方法を提供する。【解決手段】湾曲駒20Bと接続管57Aとはクリップ61,62を用いて接合される。湾曲駒20Bには、第1連結用貫通孔64a,64bが形成されている。接続管57Aは、第1連結用貫通孔64a,64bと連通する位置に配された第2連結用貫通孔69a,69bが形成されている。クリップ62は、弾性部74と、貫通部75a,75bと、抜け止め部76a,76bとを有し、弾性部74が接続管57Aの外周面67aに沿って配され、貫通部75a,貫通部75bが第1及び第2連結用貫通孔64a,64b,69a,69bを貫通し、抜け止め部76a,76bが湾曲駒20Bの内周面に沿って配される。【選択図】図6