Magnetoelectric (ME) effect, triggered much interests because of its potential of the cross correlation between the electric and magnetic properties of matter for technical applications such as magnetic field sensors, transducers, actuators. Magnetoelectric (ME) effect represents the coupling between a change in electric polarization in a solid when a magnetic field is applied. This study reports on the magnetoelectric (ME) effect observed in nanocomposite polymer consisting of polyurethane (PU) filled with 2.5wt% and 5wt% of Fe3C magnetic nanoparticles. In general, the electric response to an applied magnetic field (H) on polymer composites filled by magnetic particles is not well known. That is the reason why our study aims to show the influence of the magnetic fillers (Fe3C) in PU matrix. Our experimental findings are discussed for different situations.