A tube connecting structure of an endoscope includes: a neck connecting member having a first connecting portion, the neck connecting member connecting a flexible electric wire； a cable connecting member having a second connecting portion, the cable connecting member being connected a hard cable, the flexible cable and the hard cable are electrically connected to a circuit board； a connecting outer cover has a third through hole, and a connecting portion is disposed in the third through hole, the neck connecting The first connecting portion is assembled to the joint portion, the cable connecting member is assembled to the joint portion with the second connecting portion thereof, the neck connecting member is spaced apart from the cable connecting member by a predetermined distance, and Form a reserved space.一種內視鏡之管部連接結構，包括：一頸部連接件具有一第一連接部，該頸部連接件連接一軟電線；一電纜連接件具有一第二連接部，該電纜連接件連接一硬電纜線，該軟電線與該硬電纜線電性連接至一電路板；一連接外蓋具有貫通之一第三通孔，於該第三通孔內設有一結合部，該頸部連接件以其第一連接部組接於該結合部、該電纜連接件以其第二連接部組接於該結合部，該頸部連接件與該電纜連接件相隔預定距離、並於二者之間形成一預留空間。
