A cord tension adjustment unit of an endoscope diversion device comprises a sleeving member, an adjustment member, a first and a second cord, and a first and a second limiting block respectively secured at the two cords. The sleeving member has a tapped hole extended from a first end face to a second end face, a limiting hole penetrating a first side surface, a side opening penetrating a second side surface and the wall of the limiting hole, and a perforation penetrating the second end face, the second side surface and the wall of the limiting hole. The adjustment member has a stud disposed at the tapped hole and a through hole. The first limiting block is abutted at the adjustment member. The first cord passes through the through hole and is extended at a direction distal from the sleeving member. The second limiting block is disposed at the limiting hole. The second cord passes through the through hole and is extended at a direction distal from the adjustment member. The adjustment member can adjust the tension of the cords and correct the direction of the endoscope lens.一種內視鏡轉向裝置之繩索張力調整單元，包含有一套接件、一調整件、第一、第二繩索，以及分別固定於該二繩索之第一、第二限位塊，套接件具有自第一端面朝第二端面延伸的螺孔、貫穿第一側面的限位孔、貫穿第二側面及限位孔孔壁的側開孔，以及貫穿第二端面、第二側面及限位孔孔壁的穿孔，調整件具有一設於該螺孔之螺柱及一通孔，第一限位塊係卡抵於調整件，第一繩索係穿設於該通孔並朝遠離套接件之方向延伸，第二限位塊係設置於該限位孔，第二繩索係穿設於該穿孔並朝遠離調整件之方向延伸；調整件可調整繩索張力，並校正內視鏡鏡頭之方向。
