The issues that arise in this articles are the causes and the bases of social - and sexual - devience according to a sociological point of view. Then a search through a number of 350 files of sexual - crimes in Babol, declares the causes on a sociological point of view, cultural transmission & contrast theory. In assessment during this research regarding age, sex & occupation as the main criteria estimates that 18% of sexual crimes among men & 58% of the same crimes among women occur before the age of 19. Besides, 64% of the sexual - crimes of men & 14% of women are committed between 20-29. A ،deep concern of this article to occupation status shows that 55%, of men exist as shopkeepers, employees & drivers. However 25% of theirs committed fellows are low workers & 35% as students commit such crimes. Therefore, we get strong sense of-' the core bases including coincidence of age - groups, economical straits & poverty that have brought tire sexual - devience into existence.