John Lennon's killer Mark David Chapman has been denied parole for the sixth time.

The murderer, who gunned down the former Beatles star outside his home in New York in 1980, has been eligible for parole since 2000.

He's scheduled to appear before the parole board again in 2012.

Chapman, 55, was convicted of murdering Lennon and sentenced to 20-years-to-life behind bars.

Lennon's widow Yoko Ono has always fervently opposed Chapman's parole bid.