A cross-party working group is to look at and advocate for the rights of lesbian, gay, bisexual, transgender and intersex (LGBTI) people.
Initiated by Green Party MP Jan Logie, it includes 12 members, from her party, National, Labour, New Zealand First and Act.
Ms Logie said the group would provide education, leadership and legislative progress on LGBTI rights.
All MPs had been sent an email telling them of the opportunity to join.
"We are hoping others will see the importance of the work we are tackling and want to join us," she said.