WA Premier Colin Barnett is against MPs breastfeeding in Parliament.

New WA Labor MP Laine McDonald said in her inaugural speech to that standing orders should be relaxed so that young children can be brought into the chamber, and fed if they are hungry.

Ms McDonald said it would make the floor of Parliament a more family-friendly environment.

“In 2016, the time has come to change antiquated rules and truly have a family-friendly parliament,” said Ms McDonald.

“There is no sensible or just reason to maintain outdated rules that make life as a parliamentarian more difficult for women.

“Women who choose to breastfeed in Parliament should not be subject to criticism or ridicule, as we have seen overseas.”

But Mr Barnett says his Government already accommodates any MP who needs to feed a young child.

“If that mother is not paired, we will always give an immediate pair so that mother can leave the chamber, look after a baby and return when she is finished,” Mr Barnett said.

“Everyone respects the mother and the child but not on the floor of the chamber, it is only for Members of Parliament and you don't start to have babies and children in the Parliament.

“All Members of Parliament have their offices within the Parliament where they have got privacy.

“It is not, in my view, necessary for a mother to take a baby into the chamber.”

One the federal level, MPs caring for children are allowed to bring them into the chamber.

Federal Parliament changed its rules this year after controversies including when Assistant Treasurer Kelly O'Dwyer asked to express extra milk so as not to avoid missing her parliamentary duties.