Archer John Porter Martin, FRS (1 March 1910 in London–28 July 2002) was a British chemist who shared the 1952 Nobel Prize in Chemistry for the invention of partition chromatography with Richard Synge.

He was head of the Biochemistry Division of Boots Pure Drug Company from 1946 to 1948, when he joined the Medical Research Council.
There, he was appointed Head of the Physical Chemistry Division of the National Institute for Medical Research in 1952 and was Chemical Consultant from 1956 to 1959.
He specialised in Biochemistry, in some aspects of Vitamins E and B2, and in techniques that laid the foundation for chromatography. He developed partition chromatography whilst working on the separation of amino acids, and later developed gas-liquid chromatography. Amongst many other honours, he received his Nobel Prize in 1952.
He was married, with one son and three daughters. He died 28 July 2002.