Time of Silence (Spanish: Tiempo de silencio) is a 1962 novel by the Spanish writer Luis Martín-Santos.^[1][2]

The novel is about the medical student Pedro, who studies cancer in mice, and his interactions with people in Madrid. An assistant wants to sell the mice illegally. Pedro's lower-class landlady tries to marry off her granddaughter. Pedro has an intellectual friend who achieves very little. Pedro becomes ensnared in a deadly drama when he performs an abortion on a girl who ends up dead. The girl's boyfriend then murders Pedro's fiancee.^[3]

Kirkus Reviews wrote that the novel suffers from too much intellectualism, but that the depiction of Madrid gives it "a degree of power".^[3]

The novel was the basis for the 1986 film Tiempo de Silencio.^[4]