Eugenie… The Story of Her Journey into Perversion is a 1970 British sexploitation horror film directed by Jesús Franco, and starring Maria Rohm, Marie Liljedahl, Jack Taylor, and Christopher Lee. A modern-day adaptation of the Marquis de Sade's book Philosophy in the Bedroom (1795), the film follows a teenage girl who, after accepting an invitation to vacation on island with a woman and her brother, instead finds herself at the center of a series of disturbing sexual experiments.

Eugenie… The Story of Her Journey into Perversion marked the second of Franco's de Sade-themed films after Marquis de Sade: Justine (1969). It has often been confused with his later and more explicit Eugenie de Sade (filmed in 1970, released 1973), an adaptation of de Sade's short story "Eugénie de Franval" (1800) which starred Soledad Miranda, as both films are often referred to simply as Eugenie. To complicate matters further, the director went on to make a second adaptation of Philosophy in the Bedroom, entitled Eugenie (Historia de una perversión), in 1980.