The greatest attention in the article is paid to people with abnormal sexual attraction in the form of pedophilia. A special role is assigned to different types of relations to sexual attraction (ego-synthonic and ego-dystonic). We considered peculiarities of gender identity through the prism of the «I-concept» of the individual, that allows you to come closer to understanding their role in the realization of sexual desire. Materials for the research were provided by the forensic sexology laboratory FSBA «V.P.Serbskiy State Research Center of Social and Forensic Psychiatry» at the Ministry of Health of Russian Federation. The sample include 43 persons - 27 with a disorder of sexual desire in the form of pedophilia and 26 people who committed sexual acts against children, in the absence of a sexual attraction. In the comparison group were 27 people of the statistical norm. The results of the study demonstrate for persons with pedophilia such gender identity features as expressed femininity of the I-image, androgynous type of the «I-ideal» image, as well as feminine behavior models in interaction and communication. Depersonification of sexual preference object is detected for persons with aggressive tendencies. The obtained data could be used for profiling a prospective criminal portraits and solving expert questions.