The villagers, who witnessed the accident, said the two choppers collided soon after take off and crashed near the village, 15 kms from Jamnagar city.
The choppers were on training sortie, officials said.
"Two MI-17 choppers have collided mid-air in which at least six persons have died," SP Jamnagar Harikrishna Patel told PTI.
Indian Air Force officers, police officials and Jamnagar municipal corporation fire brigade have reached the spot and are assessing the situation.
An IAF spokesperson in New Delhi said that a court of inquiry has been ordered to determine the reasons behind the crash.