Lady Chatterley's Lover is a novel by D. H. Lawrence, first published in 1928. The first edition was printed privately in Florence, Italy, with assistance from Pino Orioli; an unexpurgated edition could not be published openly in the United Kingdom until 1960. (A private edition was issued by Inky Stephensen's Mandrake Press in 1929.) The book soon became notorious for its story of the physical (and emotional) relationship between a working-class man and an upper-class woman, its explicit descriptions of sex, and its use of then-unprintable words.

The story is said to have originated from events in Lawrence's own unhappy domestic life, and he took inspiration for the settings of the book from Eastwood, Nottinghamshire, where he grew up. According to some critics, the fling of Lady Ottoline Morrell with "Tiger", a young stonemason who came to carve plinths for her garden statues, also influenced the story. Lawrence at one time considered calling the novel Tenderness and made significant alterations to the text and story in the process of its composition. It has been published in three different versions.

The story concerns a young married woman, Constance (Lady Chatterley), whose upper-class husband, Clifford Chatterley, described as a handsome, well-built man, has been paralyzed from the waist down due to a war injury. In addition to Clifford's physical limitations, his emotional neglect of Constance forces distance between the couple. Her sexual frustration leads her into an affair with the gamekeeper, Oliver Mellors. The class difference between the couple highlights a major motif of the novel which is the unfair dominance of intellectuals over the working class. The novel is about Constance's realisation that she cannot live with the mind alone; she must also be alive physically. This realisation stems from a heightened sexual experience Constance has only felt with Mellors, suggesting that love can only happen with the element of the body, not the mind.