The man was identified as Kriangsak Udomsup, 29, a resident of Buri Ram's Lam Plaimat district.
Muang Nakhon Ratchasima police were alerted at 2.04am that a body was seen hanging at a pedestrian bridge in front of the Suranakhon Market in the heart of the district.
A doctor determined that Kriangsak died about two hours earlier.
The body was sent to the provincial hospital for an autopsy.