Harris County court records showed that Cleveland Cavaliers guard Harden was taken into custody at 3:41 a.m. when an unconcealed handgun was spotted in his Mercedes.
Harden confirmed the gun was his and was arrested and booked into jail and released on a $100 bond, according to the documents, in which authorities said that the gun was not holstered and was in plain view.
Harden, 37, is to appear in court on June 22nd, and his bond terms ban him from possessing any firearms, ammunition or other weapons.
The Cavaliers did not immediately comment on the incident.
Cleveland acquired the veteran guard at the trade deadline in February.
He averaged 19.2 points and 5.5 assists during the playoffs to help the Cavs reach the Eastern Conference finals, where they were swept by the New York Knicks.
He was the third overall pick in the 2009 NBA draft by the Oklahoma City Thunder and starred with the Houston Rockets, earning MVP honours with them in 2018.
Harden, an 11-time All-Star, has also played with the Brooklyn Nets, Philadelphia 76ers and Los Angeles Clippers.