Guy Marchand (22 May 1937 – 15 December 2023) was a French actor, musician, and singer. He appeared in over 100 films in over 30 years, but was best known for his role as the fictional television private detective Nestor Burma.

Guy Émile Marchand was born in Paris, 19th arrondissement, the son of a scrap merchant and a housewife and grew up in Belleville, during the Occupation and contracted tuberculosis at the age of ten. Spending time in Sarthe in the country he learned to ride and kept a love of horses throughout his life. In Paris, he regularly went to the Danube cinema. While at the Lycée Voltaire secondary school in Paris he played the clarinet in night clubs in Saint-Germain-des-Prés.