The Zlín Z-37 Čmelák or Let Z-37 Čmelák is a Czechoslovak single—engine low-wing aircraft, originally developed as an agricultural aircraft, which has also found application in a number of other fields.
The aircraft had and has a wide range of applications, perhaps the most famous is its agricultural version for spraying bulk materials and for spraying. Another application is the towing of aerial banners and gliders. The manufactured "non-agricultural" (or training) version or with a cabin for 1-2 passengers, as well as a subsequently rebuilt agricultural version, are used as a transport aircraft for passenger transportation and for sightseeing flights.

- Crew: 1
- Capacity: 650 liters of chemicals
- Working width: 12 meters
- Engine power: 232 kW (315 hp)
- Maximum speed: 237 km/h
- Cruise speed: 180 km/h

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