Porous media is attracted attention for heat exchangers to improve system performance. In this study, to apply a magnetic fluid as a working fluid in the heat transfer system with porous media, the flow behaviors of the magnetic fluid flow via the ceramic foam porous media by applying a magnetic field were investigated experimentally. The experiment was performed in a rectangular duct, and a water-based magnetic fluid was used as the working fluid. The magnetic fluid flows through a ceramic porous media with a pore density of 13 pores per inch. The Reynold number based on the hydraulic diameter of the test section, Re_Dh, is varied in the range of 100-1500. The magnetic field is applied at the center of the porous media in the test section, and the magnetic field intensity is 100 and 300 mT. Pressure drop and heat transfer coefficient with and without the magnetic field are measured to discuss the relationship between flow resistance and heat transfer. As the result, the flow behavior is quite different between with and without porous media. In the case of magnetic fluid flow through the ceramic foam porous media, the heat transfer is enhanced by applying magnetic field and this enhancement becomes weak with increasing Re_Dh, while the pressure drop increases by applying magnetic field and increasing ratio is almost constant with Re_Dh.