To provide a connecting link capable of absorbing a large installation error by increasing adjusting allowance of dimension in the axial direction and connecting a driving arm with a driven arm.

A link shaft part 2 having a highly rigid structure is constituted by contraposition of a steel pipe 2A having large diameter and a steel pipe 2B inserted into the steel pipe 2A having the large diameter so as to come in and out and having small diameter. Any of a plurality of sets of bolt insertion holes 7 provided in the steel pipe 2A having the small diameter which are a pair and one set of bolt insertion holes 7 are selected to correspond concentrically. A bolt 4A of a connection member 4 is inserted, and a nut 4B is tightened to adjust dimension in the axial direction of the connection link 1 by corresponding to positions of a pair and one set of selected bolt insertion holes 7.