An Active suspension using an actuator has most superior performance. But it does not always fit common automobile because of its high energy consumption. Therefore it is necessary to study an active suspension which can operate by the low energy consumption and achieve the highly isolation vibration performance. To decrease energy consumption, we proposed a hybrid suspension consisting of a pneumatic cylinder as an actuator and a variable damper. Energy consumption of a hybrid suspension is lower than an active suspension and isolation vibration performance is higher than semi active suspension. And to obtain lower energy consumption suspension, we mainly operate active control in low frequency area and operate semi-active control in high frequency area by using same kind of frequency shaping filter. The performance of the proposed suspension system is discussed through experiments.