Computer Simulation of 3-dimensional Magnetic Reconnection ; Some three-dimensional interesting phenomena K. Kondoh (Ehime Univ.) and M. Ugai We have been studied magnetic reconnection evolutions by computer simulations on the spontaneous fast reconnection model. In this paper, we present some of interesting three dimensional phenomena results from magnetic reconnections. For example, 1)The extension of high pressure region between the reconnection points toward the normal direction of reconnection jet after the secondary tearing. 2) The flow structures around the plasmoid. 3)The propagation of the twisted plasmoid caused by sheared magnetic field.