cavity 22 until 90 95 of the space of the mold cavity 22 is filled and a mold base is formed the attachment film 100 is now attached on the surface of the mold base and a dimensional pattern is formed on the attachment film in block s 110 the mold is closed again and the parting surface of the male mold 30 and the female mold 25 contact each other as shown in fig4 melted plastic material is injected into the mold squeezed by the male mold 30 the cutting part 26 of the male mold 30 cuts off the predetermined section of the attachment film 100 attached on the mold base with the three dimensional pattern corresponding to the pattern 222 in step s 112 melted plastic material injection stops in step s 114 the mold is cooled in step s 116 the mold is opened and a molded article is obtained commensurately the transporter 15 removes the attachment film 100 from the male mold 30 and the female mold 25 and a subsequent molding cycle begins fig6 is a flowchart of a second embodiment of a method for forming three dimensional patterns on a molded article in block s 201 a three dimensional pattern is formed in the inner side of the mold cavity 22 in block s 202 a serial attachment film 100 is provided in block s 204 the serial attachment film 100 is transported to a position between the female.