To provide a connection rod superior in durability, hardly causing crack in a welded part, even when a cylinder body is set short axially.

This connection rod has a rod body 1, the cylinder body 11 and a vibration control bush, and is formed so that the rod body 1 is composed of a cross-sectional U-shaped connection plate and a reinforcing plate 4, and an end part in the longitudinal direction N of the connection plate is welded and fixed to an outer peripheral surface 11G of the cylinder body 11, and both side parts 4S in the width direction of the reinforcing plate 4 are welded and fixed to both sidewalls 5 of the connection plate 3, and an end part in the longitudinal direction N of the reinforcing plate 4 is welded and fixed to the outer peripheral surface 11G of the cylinder body. A pair of extending parts 6 extending to the outer side of an outside surface of both sidewalls 5 of the connection plate in the peripheral direction S of the cylinder body 11, are arranged in the end part in the longitudinal direction N of the reinforcing plate 4. The end part and the extending parts 6 in the longitudinal direction N of the reinforcing plate 4 between both sidewalls 5 of the connection plate 3, are welded and fixed to the outer peripheral surface 11G of the cylinder body 11.