Police in WA will wear cameras for the first time in an effort to reduce attacks on officers and to fight crime and anti-social behaviour.

Around 300 officers in Perth and Bunbury will be fitted with body-worn cameras in a six-month trial that will begin in the South West on Monday.

A police officer fitted with the new cameras, with Police Minister Liza Harvey looking on.

Officers in Perth will start using the Breon Defence Systems cameras in early June.

Similar technology is already used by officers in Queensland, South Australia, NSW and the Northern Territory.