Introduction: Physical self-concept, as a significant component of the general self-concept, is defined by most authors as a subjective presentation of physical appearance accompanied by physical experiences influenced by sociocultural environment, especially in adolescence (Majdak & Kamenov, 2011; Pokrajac-Bulian et.al., 2004). Research has shown that physical self-perception is an important moderatorof physical activity and exercise (H. W. Marsh & Perry, 2005) and that it has a significant impact on developing an active and healthy lifestyle (H. W. Marsh et.al., 2006). In addition to the positive impact on physical self-perception, physical exercise and sports are important factors in achieving optimal mental and physical health, which is confirmed by research around the world (Jurakić & Andrijašević, 2007). Goal: The main goal of this study was to determine the general differences in the physical self-concept of adolescents of the same gender in the capitals of three countries: Croatia, Serbia and Bosnia and Herzegovina. Sub-goals of the study were to examine are there gender differences in the physical self-concept of adolescents in different countries; to determine the differences in the physical self-concept of the respondents with regard to sports experience, ie whether the respondents engage in sports or not; and examine whether there are differences in respondents physical self-concept depending on whether they engage in individual or team sports. Methods: For the purpose of data collection, the „Physical Self-Concept Questionnaire” PSDQ (Marsh et.al., 1994, according to Radisavljević-Janić, 1996) of 78 particles was used. The survey of participants was proven on a suitable sample of a total of 1012 eighth grade students in six primary schools, in the Republic of Croatia (n = 298), Bosnia and Herzegovina (n = 321) and Serbia (n = 393). The results: The results showed that between adolescents from the territory of the Republic of Croatia, Bosnia and Herzegovina and Serbia there are consistent and expected differences in physical self-concept with regard to gender and with regard to (not) playing sports. The male adolescent's physical self-concept is better than the female adolescent's physical self-concept. The physical self-concept of an athlete is better than the physical self-concept of a non-athlete. Finally, it has been shown that the physical self-concepts of athletes engagedin individual sports and sports engaged in team sports do not differ. Conclusion: The comparison of adolescents' physical self-concept with regard to the country in which they live (Croatia, Serbia and Bosnia and Herzegovina) showed that there are certain specifics in the physical self-concept of adolescents from certain countries, but also that there are no clear trends their body is systematically perceived worse or better than adolescents from the remaining countries.