Daniel Morcombe's killer has been attacked in prison for the second time.

The man who murdered Queensland schoolboy Daniel Morcombe has again been attacked in prison, but he’s not seriously hurt.

Brett Peter Cowan suffered superficial wounds to his neck and ear when a fellow prisoner attacked him with an “improvised implement”, Queensland Corrective Services said.

“A prisoner suffered superficial wounds to his neck and ear when he was assaulted by another prisoner in a common area of … Wolston Correctional Centre on Friday,” Corrective Services said in a statement.

“The prisoner did not sustain any serious injury.”

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It’s the second time a fellow prisoner has attacked Cowan at the centre, where he’s serving a life sentence for abducting and murdering 13-year-old Daniel on the Sunshine Coast in 2003.

In August 2016, a fellow prisoner tipped a bucket of boiling water on him.

Friday’s attack on Cowan has been referred to the Queensland Police Corrective Services Investigation Unit.

You can support child safety awareness by donating to The Daniel Morcombe Foundation here.