NOVELTY - The system (1) has an air supply piping (20) supplying air to a fuel cell (10). An air cleaner (40) is arranged from a compressor (30) in an upstream along air flow direction. A silencer (50) is arranged in the air cleaner at the upstream of the air flow direction. Another silencer (60) e.g. resonance silencer, is arranged in the compressor at the upstream of the air flow direction and in the air cleaner at a downstream of the air flow direction, where the silencer does not have a sound absorption material. An outer peripheral surface of an inner pipe (51) is covered by an outer pipe (52).    USE - System for supplying air to a fuel cell mounted in a fuel cell electrical vehicle and a motor vehicle such as car.    ADVANTAGE - The silencer is provided with the sound absorption material and is arranged in the air cleaner at the upstream of the air flow direction when the sound absorption material is deteriorated and torn to pieces, thus catching the torn pieces of the sound absorption material by the air cleaner, and hence reducing that the sound absorption material torn to pieces in the air flow direction downstream from the air cleaner flows, the torn-off sound absorption material flows in into the fuel cell side, and sound of a high frequency band region that exists in a range of 1000 Hertz or more. The other silencer is arranged in the compressor at the upstream of the air flow direction and in the air cleaner at the downstream of the air flow direction, where the silencer does not have the sound absorption material, thus reducing sound of a low frequency band region existing below the range of 1000 Hertz. The system is provided with the silencers, thus saving space in an efficient manner, and reducing suction pulsation sound of the fuel-cell vehicle.    DESCRIPTION OF DRAWING(S) - The drawing shows a perspective view of an air supply system.'(Drawing includes non-English language text)'    Air supply system (1)    Fuel cell (10)    Air supply piping (20)    Compressor (30)    Air cleaner (40)    Silencers (50, 60)    Inner pipe (51)    Outer pipe (52)