A Doctor of Conviction () is a 1959 West German drama film directed by Werner Klingler and starring Adrian Hoven, Willy Birgel, Antje Geerk and Ellen Schwiers. It was shot at the Göttingen Studios in Lower Saxony. The film's sets were designed by the art directors Max Mellin and Theo Zwierski. It is based on the 1935 novel of the same title by Karl Unselt, which had previously been made into the 1936 film A Doctor of Conviction.