The Government's being told to stamp out racism in the Police force, following an admission of bias against Maori.

Police Commissioner Mike Bush has admitted some Maori have faced discrimination at the hands of Police.

Labour Police spokesman Kelvin Davis said it's something many Maori have known for years.

He said the issue of Police bias is out in the open, and the Government needs to respond with swift and serious action.

"It's good that the commissioner has admitted it, now it's time to do something about it and to help patch up our reputation," Davis said.

"Maori have always felt that we've been over represented in a lot of crime figures and we now know that's unduly so."

He's calling for the the Waitangi Tribunal to consider Police bias in its investigation of Maori offending rates.