Four-wheeled vehicle suspension device

A four-wheeled vehicle suspension device comprising a hydraulic cylinder for each wheel, said hydraulic cylinders are provided in two pairs, wherein at least a first pair of said hydraulic cylinders is interconnected through a pressure regulator, and a second pair of hydraulic cylinders is interconnected with each other and connected with said pressure regulator by a communication passage means, wherein a flow rate regulator is provided between said pressure regulator and said second pair of hydraulic cylinders.