To provide a power generating suspension system capable of generating power by utilizing energy of a bound, vibration, and impact absorbed by a spring and a shock absorber.

The suspension system comprises a hydraulic pump 1 and an oil flow control valve 3 which follow the extension and contraction of the spring 12 of the suspension system provided in each wheel so as to increase the power generation amount by increasing the rotation of a power generator 9 with a speed increasing gear 8 in order to maximize the usage of the oil pressure flow due to the contraction of the hydraulic pump. When the oil pressure flow fed from the hydraulic pump is excessively high in pressure, the oil pressure flow is passed through an oil pressure regulator 6 to protect the hydraulic motor 7, which performs highly efficient power generation with smooth rotation.