Effects of electrode shape on fusion reaction rate in the cylindrical IECF device are investigated by the experiments to verify simulation results. The effects of the cylindrical edge of anodes are clearly observed, but the effect of cathode length and radius is not clear in the preliminary experiments. The maximum neutron generation rate of ~47 thousand neutrons per second is obtained with 37.5kV, 6mA discharge using an anode with 40-mm depth edge.