The Man Who Couldn't Say No is a 1938 German romantic comedy film directed by Mario Camerini and starring Karl Ludwig Diehl, Karin Hardt, and Leo Slezak. It is a remake of the 1936 Italian film But It's Nothing Serious also directed by Camerini. It was shot at the Halensee Studios in Berlin. The film's sets were designed by the art directors Gabriel Pellon and Heinrich Richter.