The chief executives of Australia's four major banks will be criticised by politicians about the "appalling behaviour" revealed at the banking royal commission.

The House of Representatives committee on economics will question the heads of Commonwealth Bank, Westpac, ANZ and NAB in Canberra on Thursday and Friday, with a third hearing day to be held next week.

Committee chair and Liberal MP Tim Wilson says the hearings will be an important opportunity to consider how to ensure appalling behaviour is not repeated among the banks, without taking away their essential role in the economy.