The purpose of this study was to analyse representations of hegemonic masculinity in physical education (PE) mixed classes, the only curricular discipline having sport as its contents in the Portuguese educational system. The analysed data come from semi-structured interviews with Portuguese secondary school teachers and students and from class observation. The sample is formed by 10 PE teachers (five men and five women), 40 students (20 boys and 20 girls) and six classes. An inductive analysis of the data was carried out following the processing of the information by the program "QSRNVivo." Sports practices seem to be responsible for spreading a hegemonic masculinity, with an implicit learning and recognition of the necessary manhood code indispensable to a full affirmation and acceptance of being a man. It seems then that we have to consider PE as a singular social space in which the discourses and the practice reiterate the traditional form of masculinity. (Contains 1 note.)