A. M. Thomas was born on June 4, 1912, in the village of Kurikad[1] in Kingdom of Cochin.

Member of Committee appointed by Cochin Government to enquire into disabilities of Pali tenants and Tenancy, Select Committees, Member of Travancore-Cochin Assembly between 1949 and 1952, Member of Executive Committee of Travancore-Cochin Assembly Congress Parliamentary Party and also Congress Whip from 1949 to 1951, and Speaker of Travancore-Cochin Legislative Assembly during 1951–52 at an age of 39.

He was elected from Ernakulam[2] to Lok Sabha[3] for three consecutive terms from 1952 to 1962.

He was Union Deputy Minister of Food and Agriculture from 1957 to 1963.He led Indian Delegation to the United Nations Sugar Conference held in Geneva in 1958 and 1961 and Delegation to Canada and the United States in 1960 as well.

Thomas died at his residence in Kochi on the morning of 27 April 2004.