The suspect was identified as Nong Van Ky, 26, of Dam Thuy commune in Trung Khanh district.
Border guards on duty in Ban Mam village caught Ky red-handed as he was smuggling the ivory.
At the scene, the police seized 25 elephant tusks and 52 ivory pieces, weighing a total of 51 kg.
Ky confessed that he intended to transport the ivory to China for buyers there.
The case is under further investigation.