To provide a running stabilizing link mechanism in a vehicle connection part preventing shaking of a vehicle particularly pitching of a vehicle C.

A mechanism, applied for a vehicle connection part formed by connecting three car bodies through a relatively short vehicle C relating to front/rear vehicles A, B, is provided with a link receiver base 2 provided rotatably with a perpendicular axis serving as the center in a central part as viewed by plane in the vehicle C, connecting bar 4 successively providing one end part by a bearing 7 rotatably with a perpendicular axis serving as the center in a position separated by an equal distance in a diametric direction from the center of the link receiving base, and a mounting metal 3 provided in the right/left direction central part in an end part of a side of the vehicle C of front/rear each vehicle to successively provide the other end part of the connecting bar 4 by a bearing 8 rotatably with a perpendicular axis serving as the center.