Two more National Party MPs have announced they will stand down at the next election.
MP for Hunua Paul Hutchison says he will not seek re-election next year, while list MP Cam Calder has also announced he is retiring from politics.
They join Local Government Minister Chris Tremain and West Coast-based list MP Chris Auchinvole, who have already announced they will stand down at the next election in 2014.
Dr Hutchison says he is looking forward to spending more time with his children, as well as pursuing professional opportunities here and overseas.
Dr Calder says he too is looking at opportunities in New Zealand and overseas.