It consists of High Voltage Power supply, Polymer solution tank, Spinneret and grounded Collector. Solution is pushed out at constant speed from Polymer solution tank to Spinneret. It applies 10-30kV to spinneret. When electric attraction exceeds the surface tension of polymer solution, Polymer jet is sprayed toward collector. At this time, solvent of Polymer jet is gradually volatilized. On the collector, the size of jet becomes reduced in nano level.