Erling Maartmann (3 November 1887 – 10 February 1944) was a Norwegian football player. He was born in Oslo. He played for the club Lyn, and also for the Norwegian national team. He competed at the 1912 Summer Olympics in Stockholm. [1] He was Norwegian champion with Lyn in 1908, 1909, 1910 and 1911. [2] His twin brother Rolf Maartmann was also an international football player. [3]