The PZL SM-2 was a Polish light utility helicopter, enlarged version of license-built Mil Mi-1, developed and produced by WSK PZL-Świdnik.

From 1956, the Soviet light three-seat or four-seat helicopter Mi-1 was produced under license in the Polish WSK PZL-Świdnik works in Świdnik, under a designation SM-1 – and as much, as 1594 were manufactured.

In 1957, works started in WSK PZL-Świdnik to modernize the helicopter and fit it with an enlarged, five-seat cabin.

[1] Unchanged were: the engine, transmission and rotor, the fuselage boom and the landing gear (only early machines had different front wheel suspension).

Its take-off characteristics and performance were slightly worse than of Mi-1/SM-1: one of the reasons was an unsuitable carburetor intake, but this defect was improved only on some helicopters.

The helicopter was manufactured only in one variant, and could change its role to passenger, transport, air ambulance or flying crane.

[1] An additional two patients could be carried in detachable external closed capsules on either side of the fuselage, typical for Mi-1.

The crane variant (sometimes known as SM-2D) was used in limited numbers for search and rescue missions; it had a hydraulic winch that could lift 120 kg, in a place of a right front seat.