The tube joining device 1 is disposed adjacent to a first tube holding portion 41 capable of holding the first tube T1 and the first tube holding portion, and moves the second tube T2 to the first tube. The second tube holding portion 42 that can be held at the parallel position and the housing 2 provided with the lid member 20 that is closed so as to cover the fusing-joining portion C between the first tube and the second tube. The lid member is slidable along a direction in which the first tube and the second tube are juxtaposed.チューブ接合装置１は、第１のチューブＴ１を保持可能な第１のチューブ保持部４１と、第１のチューブ保持部に隣接して配置され、第２のチューブＴ２を第１のチューブに対して並行な位置で保持可能な第２のチューブ保持部４２と、第１のチューブと第２のチューブの溶断－接合箇所Ｃを覆うように閉じられる蓋部材２０が設けられた筐体２と、を有し、蓋部材は、第１のチューブと第２のチューブが並置される方向に沿ってスライド可能である。
