A fake-preventing label formed integral with a product in a mold includes an inner decorative layer (1) printed thereon with designs or letters and an outer protective layer (2) bonded with the inner decorative layer. The inner decorative layer and/or the outer protective layer respectively have holes (10,20), or a recess (30) and/or provided with a metallic layer or an ornament (11). After the label is placed in the mold and formed integral with the product therein, the holes and/or the metallic layer and/or the ornament of the label produce various appearances, producing a product with a fake-preventing label. And a method for manufacturing a product with a fake-preventing label includes steps of placing a label in a mold and of injecting material in the mold for shaping a product with the label bonded together.