The present invention provides a method of fabricating a mask for forming wood grain patterns, the method comprising: subjecting a metal plate to an etching process to process a selected pattern on the metal plate; producing a pattern sheet using the etched metal plate an a flexible sheet; attaching the produced pattern sheet to the surface of a product; and subjecting the product to an electroforming process to thereby fabricate the mask. With the method, the time and cost for production of the mask can be remarkably reduced.