Four people have been charged after a sit-in protest at former prime minister Kevin Rudd's Brisbane office.

Six people staged a protest at Mr Rudd's electorate office in Morningside this morning in response to , police said.

Officers were called in when the group refused to leave.

Police said one member of staff was injured during the protest.

Four people were arrested and later charged.

A 50-year-old Marsden man was charged with enter premises and commit indictable offence.

He is due to appear in Brisbane Magistrates Court on February 28.

Two 62-year-old Camp Hill men and a 35-year-old Woollongabba woman have been charged with trespass.

The men are due to appear in the same court on February 28 while the woman is due to appear on March 3.

Earlier, one of the protesters, Karen Fusi, said Government policy did not recognise Indigenous sovereignty.

"They're not closing the gap. The gap is getting bigger. And they're the ones who formed it," she said.