PURPOSE: To pattern easily and at a low cost a free pattern to a metallic extruded shape material by pinching a forming material cooled to a prescribed temeprature or so, between guide rolls, and passing said material between a pattern marking roll and its pressure roll while transferring it.

CONSTITUTION: A forming metallic material such as brass, aluminum, etc. heated to 450W700°C temperature is extruded from a die, and this extruded shape material 11 is cooled to about 300°C on a cooling stand. Subsequently, this shape material 11 is pinched between rotating guide rolls 8, 8, its transfer direction is corrected, it is pressed and passed between a pressure roll 9 and a pattern marking roll 10, and desired patterning is executed.