Explosive welding is known well as the method to weld strongly for the similar and dissimilar metal combinations.It is necessary to know the behavior of metals collided in this method,such as the metal jet generation and the welded interface,to achieve the good welding of difficult-to-weld materials.In the present work,the phenomena of the high-speed oblique collision which is same as the explosive welding were observed by using a single-stage powder gun and high speed video camera.It was succeeded to photograph a metal jet clearly with changing the collision angle and the collision velocity for the oblique collision of the similar and dissimilar metals,as shown Fig.1.