Alabama's founding member Teddy Gentry, who plays bass for the group, was detained on Monday on suspicion of misdemeanour marijuana possession.
Gentry, 70, was arrested and sent to the Cherokee County Jail in northeast Alabama before being released shortly after.
Additionally, he was accused of having drug paraphernalia.
Although Gentry had no immediate reaction, Don Murry Grubbs, a band spokesman, said he was aware of the event.
Gentry and his cousins Randy Owen and Jeff Cook established the band more than 50 years ago.
They later sold more than 70 million albums and had a number of top songs.
The band organised a farewell tour after announcing its retirement from touring in 2007.