Abstract
In France and in Canada, freedom of religious beliefs constitutes a freedom of first rank protected by many texts. If France registered in its Constitution the principle of secularity of the Republic, on the other hand, in Canada the constitutional law does not recognize it but the Canadian State rests out of religious matter on the principle of neutrality. The work of thesis will consist in comparing the French and Canadian decisions in particular in order to distinguish the reasoning which underlies each approach and to thus better understand their operation in particular with regard to the principles of neutrality (Canada and of secularity France) and their consequences on the legal management of the religious claims.