Abstract: In Belgium (Flanders), citizenship education is one of the cross-curricular achievements, but it is not scheduled as a separate school subject. Alternatively, citizenship education is integrated in diverse school subjects and particularly in the religious education classes. However, with this didactical approach, two problems arise. First, attention to liberal, democratic values is not always given in a sufficient, convincing way and is often dependent on the teacher staffs efforts and goodwill. Second and more important , religious education in Belgium is organized by the independent religious instances of the recognized religions and not by the state. As a result, religious education teachers are often responsible for citizenship education, without supervision of the state. Not surprisingly, the aims of citizenship education are not always reached and Flanders scores below the European average with regard to citizenship education. In order to improve this situation, this article recommends a new, obligatory, non-confessional subject about (and not into) religion, where attention is given to religious diversity, ethics, philosophy and citizenship education. For pragmatic reasons, an immediate introduction of this subject would be impossible, but a gradual and profound change is recommended.