No. 34 Squadron ( or ), renamed No. 34 Fighter Squadron (Finnish: Hävittäjälentolaivue 34 or HLe.Lv.34 on 14 February 1944) was a fighter squadron of the Finnish Air Force during World War II. The squadron was part of Flying Regiment 3. The pilots of the No. 34 Squadron achieved 345 confirmed kills, all with Bf-109Gs. The unit lost 30 aircraft (13 in air combat, 5 to anti-aircraft fire, 7 in accidents and 5 due to technical faults). 12 pilots were listed as dead or missing, one was captured. Three pilots of the No. 34 Squadron was awarded the Mannerheim Cross.