Expedition 39
| Promotional Poster | |
| Mission type | Long-duration expedition | 
|---|---|
| Expedition | |
| Space station | International Space Station | 
| Began | 11 March 2014 UTC | 
| Ended | 13 May 2014 UTC | 
| Arrived aboard | Soyuz TMA-11M Soyuz TMA-12M | 
| Departed aboard | Soyuz TMA-11M Soyuz TMA-12M | 
| Crew | |
| Crew size | 6 | 
| Members | Expedition 38/39: Koichi Wakata Richard A. Mastracchio Mikhail Tyurin Expedition 39/40: Aleksandr Skvortsov Oleg Artemyev Steven R. Swanson | 
| Expedition 39 mission patch (l-r) Artemyev, Swanson, Skvortsov, Tyurin, Wakata and Mastracchio | |
Expedition 39 was the 39th expedition to the International Space Station. It marked the first time the ISS had been under command of a Japanese astronaut, space veteran Koichi Wakata. After Expedition 21 in 2009 and Expedition 35 in 2013, it was only the third time an ISS crew was led by neither a NASA nor an RSA crew member.
During Expedition 39, Astronauts Mastracchio and Swanson installed the "Veggie" project on the International Space Station.