Prostitution is one of the problems whose expansion has left many bad effects on the moral health of the society and weakens the moral foundations of the family and society. This has made the causes of prostitution and its prevention solutions a necessity. Based on the mentioned necessity, the purpose of this article is to investigate the causes of the crime of prostitution and ways to prevent it. This article is descriptive and analytical and it has investigated the mentioned subject by using the library method. The findings indicate that poverty and scarcity, the potential demand of dealers and the ineffectiveness of laws are the most important reasons for the occurrence of the crime of prostitution. Empowering prostitutes through institutions, amending laws and criminalizing prostitution are the most important ways to prevent this crime. The legislator in the Islamic Penal Code has paved the way to facilitate this crime by setting a maximum punishment for this crime and anomalies and did not consider this issue when approving the law to consider it as an independent crime. Therefore, as long as the phenomenon of prostitution is not part of the category of extreme punishments, this phenomenon cannot be dealt with firmly. Therefore, punishing the phenomenon of prostitution is the only solution that can be dealt with by adhering to it and bringing it under the control of laws.