The former head of the Bandidos bikie gang in Queensland has been jailed for eight years for trafficking heroin.

Mario John Vosmaer, a successful used car salesman, pleaded guilty yesterday in Brisbane's Supreme Court to trafficking the drug over 14 months from 1994 to 1996.

He will be eligible for parole in three years after telling the court that he sold the drug to help feed his wife's A$600-a-day heroin addiction.