Nils Edward Katajainen (31 May 1919 – 16 January 1997) was a Finnish fighter pilot and a Mannerheim Cross Knight.

However, after just a few months' time Finland began its pre-war mobilization, preparing for the Continuation War.

During a period of six months in 1942 Katajainen was transferred to LeLv 6 and began training on captured Soviet SB-2 bombers.

He flew anti-submarine missions, until his influential friends managed to arrange for him to return to LeLv 24.

He was discharged from the air force on 10 November 1944 following his hospitalization and subsequent convalescence period.