Green Party co-leader Russel Norman is to stand down from the role after nearly a decade.
Dr Norman will remain co-leader until the party's annual general meeting in May, and afterwards will stay on as an MP.
He said after almost 10 years in the job it was time for a change and new leadership for the party.
Dr Norman said he wanted to spend more time with his family and find a new challenge for himself.
.@RusselNorman has announced today that he'll be standing down as Co-leader at our AGM in May. pic.twitter.com/WpwNhvP903
— Green Party NZ (@NZGreens) January 29, 2015