Nanayakkarapathirage Martin Perera, commonly known as Dr. N. M. Perera (Sinhala එන්.එම්.පෙරේරා [en em pe reaira]; 6 June 1904 – 14 August 1979), was one of the leaders of the Sri Lankan Trotskyist Lanka Sama Samaja Party (LSSP). He was the first Trotskyist to become a cabinet minister. He served two terms as Minister of Finance and Leader of the Opposition, as well as one term as the Mayor of Colombo.