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 unit lost 30 aircraft (13 in air combat, 5 to anti-aircraft fire, 7 in accidents and 5 due to technical faults).

33 Squadron when the Finnish Air Force demobilized after the end of the Continuation War.

[1] The unit had an operational strength of 16 Messerschmitt Bf 109G-2s.

The unit had also one captured Hawker Hurricane Mk.IIA in its possession, but it never flew any operational sorties.