Nightmare
- Ano: 1964
- País: United Kingdom
- Xénero: Thriller, Horror, Mystery
- Estudo: Hammer Film Productions
- Palabra clave: dreams, nightmare, father murder, suicide attempt, asylum, girls' boarding school, psychological thriller, girls' school
- Director: Freddie Francis
- Reparto: David Knight, Moira Redmond, Jennie Linden, Brenda Bruce, George A. Cooper, Irene Richmond