The aim of this paper is to investigate the connection between attachment styles and risky sexual behavior in girls aged 18 to 25. The research aims to determine whether there is a difference between persons who are securely attached and persons who are insecurely attached to parents and partners in the manifestation of various indicators of risky sexual behavior (age at first sexual intercourse, use of protection during last sexual intercourse, number of sexual partners, frequency of alcohol use during sexual intercourse). Furthermore, the connection between the importance of religion and different indicators of risky sexual behavior is examined. The data was collected through an online questionnaire during May 2022. A convenient sample of N= 157 females was included. The measuring instrument Inventory of experiences in close relationships was applied (Brennan i sur., 1998; as in Kamenov i Jelić, 2003), and data were collected on gender, age, education, work, perceived socioeconomic status, size of place of residence and the importance of religion in a person's life. We collected data on risky sexual behavior through 21 questions that we designed for this research with the help of available literature. The results showed that the attachment style is not a significant predictor for the age of starting sexual relations, the use of protection during the last sexual relationship, as well as for the number of sexual partners. We obtained significant results when connecting attachment style and entering into sexual relations under the influence of alcohol. The results showed that people who have a secure attachment to their parents will be more inclined to engage in sexual relations under the influence of alcohol more often, while people who are insecurely attached to their partner will have a tendency to engage in sexual relations more often under the influence of alcohol.