In this paper homosexuality is analyzed as a phenomenon, and attempts to determine its concept and types by finding the couse of their appearance. It is pointed out to her historical existence in different societies, and to present agressive spread of homosexuality as a justified attitude. First, emphasizing basic truth about sexuality and sexual identity, in the begining the phenomenology of homosexuality is examined and guidelines are given. Further is establishing the existence of homosexuality in all known historical society and its spread in today's secularized society, with the fight of gay association to recognize homosexual behavior quite normal in society and the Church.It emphasizes the understanding of the phenomenon of homosexuality through the historical society and cultures (especially the Greek society which used different names), but only at the end of the 19th century began scientific research and interpretation. However, this phenomenon is up to the present remained unexplained because scientists still disagree about what can all affect to the occurrence of homosexuality.Finally, it is examined the Church attitude abaout the phenomenon of homosexuality, his moral judgment and pastoral relationship with people who see themselves as homosexuals. Accordin to Catechism of the Catholic Church homosexuality is not natural, its unhealty and disordered preference, but not default determined condition. Homosexual relatings are in contrary to the natural law, and with sexual act they are closing the gift of life. However, according to the developed laws on human rights, towards to persons of homosexual tendencies should be treated with gentleness and avoid any sign of unjust discrimination. Finally, it is important to conclude that the Church condemns any attempt to legalize homosexual marriage and it considers as inadmissible and unjustified.