Abstract: This invention provides a method for manufacturing a burr-free thin metal band by jetting molten magnetic metal from a nozzle onto a rotating cooling roll or a running cooling belt to permit it to be solidified. During the manufacture of such burr-free metal band, the width of a metal band to be obtained is also varied by swinging the nozzle within a predetermined angle range with respect to the direction of the width of the rotating cooling roll or the running cooling belt, or by varying the nozzle's opening length with respect to the direction of the width of the cooling roll or the cooling belt. According to this method it is possible to obtain a thin metal band having a central section with a uniform width, and first and second sections having a gradually narrowing width.