This paper reports on the blind sourced econvolution of bridge vibration from the vehicle response using independent analysis.The vibration response of the vehicle passing a bridge may include bridge vibration.Thus herein, the eigenfrequecy of a bridge is estimated by the vehicle response using independent component analysis (ICA), based on the system model of a vehicle. A state space model and ARMA model is combined into system model for ICA algorithm In the experiment, a vehicle with measuremenstem passes a simple beam bridge, together with a heavy vehicle.The responses of sprung and unsprung mass are analyzed by ICA to extract the bridge vibration component.As a result, it is found that adequate degree for ARMA model must be determined to obtain bridge eigenfrequency.