As intercultural competence among young people is one of the educational missions at European schools, teachers should themselves be able to deal constructively with cultural diversity, as well as encouraging and shaping intercultural learning processes in their classes. This article focuses on the intercultural competence of physical education teachers. "Intercultural competence", often used as a "container term", will be theoretically founded in reference to the challenges physical education teachers meet. Based on these theoretical assumptions, a special education course was developed and conducted with physical education teachers to further their intercultural competence. With a mixed-method approach, i.e., a systematic interlocking of qualitative and quantitative data, the efficiency of the course has been empirically proved: knowledge competence and methods competence as sub-competencies of intercultural competence are enhanced while educational beliefs and acculturation attitudes as performance indicators are changed. (Contains 4 tables.)