Aircraft for military training L-39 Albatros fell into a rice field a few minutes after takeoff in the central Vietnamese province of Phu Yen on Friday morning, transmitted Xinhua.
One of the pilots had died. Rescue teams are at the scene.
An official from the National Committee for Search and Rescue of Vietnam commented that there is still no information about what happened.
The plane is from the composition of the 910th Aviation Regiment, stationed in Đông Hòa province.
This year the Vietnamese Air Force suffered several crashes. In June а Su-30MK2 fighter crashed into the sea, one pilot died. Two days later, an aircraft CASA-212-40 with nine people on board participating in the operation to search and rescue the crew of the Su-30 fell into the area where the fighter crashed.