The present invention relates to a manufacturing method of abutment which is capable of manufacturing a customized abutment in order to complement in case the implantation of the fixture is inaccurate to a certain extent by designing the abutment by reflecting the intra-oral environment precisely and which is capable of accurately keeping the combining direction with the fixture which is intended in the design while fastening with the fixture. The customized abutment which is manufactured with the present invention comprises: a fixture settling part which has predetermined settling shape in the lower side in order to properly settle the implanted fixture in the alveolar bone of the patient a crown connecting part in order to connect the artificial crown of the tooth in the upper side. The fixture is fastened by comprising an equivalent lower shape with the settling shape of the fixture settling part, and arranging a scan pin which comprises an indicating sign which is positioned in the predetermined location in the upper part about the settling shape. The impression of scan pin and surrounding teeth is obtained and manufactured and oral plaster cast is manufactured by using the impression. The three dimensional plaster cast image is generated by scanning the oral plaster cast. The abutment is designed by considering a determined location and a direction after determining the location and the direction of the fixture settling part in the three dimensional plaster cast image base on the standard scan pin image of the lower shape part by aligning the scan pin image inside the three dimensional plaster cast image with the prearranged standard scan pin image. Finally, the designed abutment is processed with a figure controlling processing device.COPYRIGHT KIPO 2014[Reference numerals] (200) The three dimensional plaster cast image is generated by scanning the oral plaster cast (202) Aligning the scan pin image inside the three dimensional plaster cast image with the prea
