This article is part of the study between 1383 to 1386 and as "Factors in the Great Tehran street prostitution has been done. Territory where research and cities, including Tehran, Shemiranat and is Sharehray. Statistical research for individuals, including street prostitutes are in a one-year period between 1383 to 1384 in one of four environments 1) crisis intervention centers Welfare 2) moral security police detention 3) and Evin prison reform and education center and 4) street level between the town attended by 512 people the number of street prostitutes as individuals were investigated samples. Results of research shows that street prostitution between age at onset of each independent variables include research octet 1) family size 2) making family 3) family moral system 4) conflict and tension in the family 5) satisfaction in the family needs .