There are four main trends in the use of transgenic animals. One of the most interesting is the use of transgenic animals as the donors of tissue or organs suitable for transplantation in human ? xenotransplantation. This field of research has been undergoing intensive and increasing study during the past few years, and some encouraging progress is being made. A pig has been identified as the most suitable donor animal. The aim of the presented experiment was to produce transgenic pigs which tissues and organs could be used for the xenotransplantation needs. To target the goal, a competitive gene construct coding the same substrate as the endogenous enzyme of organ donor was introduced. In effect, transgenic boar was produced with confirmed integration of human a1,2 fucosyltransferase gene. Also, F1 generation of transgenic pigs was generated to preserve ongoing needs of preliminary research of xenotransplantation project.