Rattle of a Simple Man is a 1964 British comedy-drama film directed by Muriel Box and starring Diane Cilento, Harry H. Corbett and Michael Medwin, based on the 1963 play by Charles Dyer. A naive man who becomes involved with a prostitute.

Diane Cilento was an Australian actress and writer. She is best known for her film roles in Tom Jones (1963), which earned her an Academy Award nomination, Hombre (1967) and The Wicker Man (1973). She also received a Tony Award nomination for her performance as Helen of Troy in the play Tiger at the Gates.