The Glass Cell (1964) is a psychological thriller novel by Patricia Highsmith. It was the tenth of her 22 novels. It addresses the psychological and physical impact of wrongful imprisonment. It appeared in both the UK and the US in 1964. When first published, the book jacket carried a warning that its opening scene is "almost unacceptable".

Patricia Highsmith was an American novelist and short story writer widely known for her psychological thrillers, including her series of five novels featuring the character Tom Ripley. She wrote 22 novels and numerous short stories throughout her career spanning nearly five decades, and her work has led to more than two dozen film adaptations. Her writing derived influence from existentialist literature, and questioned notions of identity and popular morality. She was dubbed "the poet of apprehension" by novelist Graham Greene.