Snake bone of endoscope

The utility model relates to a snake bone, in particular to an endoscope snake bone. An endoscope snake bone comprises a plurality of snake bone joints and a fixing pipe, the snake bone joint located on the rearmost side comprises a body, the body forms a through groove which is through in the front-back direction and used for allowing the front end of the fixing pipe to stretch into, an installation part is arranged in the through groove, the installation part forms an installation groove, the installation part comprises two blocking pieces, and the blocking pieces are arranged on the two blocking pieces. The outer ends of the blocking pieces are connected with the body, the inner ends of the blocking pieces extend away from the inner wall of the body and do not make contact with the other blocking piece, and the distance between the inner ends of the two blocking pieces is smaller than the outer diameter of the fixing pipe. The snake joint has the advantages that the space of the passing groove of the snake