Another National MP is eyeing up a retirement from politics, party leader Simon Bridges has confirmed.
Three senior members of the National Party have quit since the election, and Mr Bridges on Monday revealed another was looking at the door.
"The honest answer is there is potentially one who could go over time ... who is working out what they will do," he told Radio NZ.
"But I'm obviously not in a position to say who it is."
The member was a list MP, Mr Bridges said.
Over the weekend media speculated either former speaker David Carter and former attorney-general Chris Finlayson were considering leaving, although both denied it.
Since last year's general election, party veterans Bill English, Steven Joyce and Jonathan Coleman have all stepped down.
But Mr Bridges said morale within the party was "very high" and that a few resignations were always likely.
The opening would see Agnes Loheni, ranked 49th on the party's list at the election, enter Parliament.