The concept of religion in Schopenhauer seems not to be one of his immediate priorities; however, it is remarkable that it is present in various parts of his works (major and minor) and that it is always one of his main occupations. Moreover, some of the great religions, such as Hinduism, Buddhism and Christianity, are transcendent in his works. In this text I will approach to Christianity, because, although it is defended in the work of that author, he also makes strong criticisms to it that, hypothetically, do not leave it well standing. Beyond the dogmatism of the faith and the institutionality of the Catholic Church, what I am going to propose in these pages is one study of its content, which is linked to its practice; I am going to make this in the light of Schopenhauerian thought. That is the objective: the study of religion from its philosophical nature.