A kind of tension fixed structure of introscope is that one hose of connection is fixed, mainly includes: a combined shell, a fixing piece and primary antibody drag-line composition. The sectional casing system is made of one first engaging member and one second engaging member. The fixing piece one end forms a fixed plate, which has at least two fixation holes, which is formed through a perforation, a channel is formed in the hose, which is connected to the perforation of the fixing piece. The tension rope one end pass through the channel of the hose, the fixing piece perforation and this etc. fixation holes, the tension rope will form at least one bending part, the fixed what fixed plate of the tension rope. For the tension rope under state of pullling, which, which will not slide, is detached from the grade fixation holes. Thereby, the tension rope is using fixation is worn, and therefore, which can flexibly cooperate the hose to adjust length.一種內視鏡之抗拉固定結構，係連接一軟管固定，主要包含有：一組合殼體、一固定件以及一抗拉索組成。該組合殼體係由一第一結合件以及一第二結合件組成。該固定件一端形成一固定板，該固定板係具有至少二固定孔，該固定件貫通形成一貫孔，該軟管內形成一通道，該通道與該固定件之貫孔連通。該抗拉索一端穿過該軟管之通道、該固定件之貫孔以及該等固定孔，該抗拉索會形成至少一個彎折部，該抗拉索固定於該固定板。該抗拉索在拉扯狀態下，該抗拉索不會滑動脫離該等固定孔。藉此，該抗拉索採用穿設固定，因此，該抗拉索能靈活配合該軟管來調整長度。
