This paper addresses Galen’s reputation and influence amongst Christians of his own day. Specifically, it examines the view that contemporary Christians mistrusted Galen because of his critical remarks about them. It required several centuries before his reputation among Christians began to grow. I shall argue that Galen’s estimation of Christianity was a mixed one. On the one hand, he was the first important pagan writer to treat Christianity as a philosophy and not a superstitious sect, comparing it with such philosophical schools as Stoicism and Epicureanism