The Victorian Greens have ordered one of their state election candidates to withdraw from campaigning after a complaint of "serious sexual misconduct" was made.

Key points: Complaint of "serious sexual misconduct" made against Victorian Greens state election candidate

Complaint of "serious sexual misconduct" made against Victorian Greens state election candidate Candidate yet to be named

Candidate yet to be named Greens ordered candidate to withdraw from campaign-related activities

The party confirmed that it has received a written complaint of "serious sexual misconduct" on Thursday morning.

Greens leader Samantha Ratnam personally contacted the woman to tell her that the party would immediately start an internal investigation.

"The Greens take allegations of this nature extremely seriously," a Greens spokesman said.

"The candidate named in the complaint has been ordered to withdraw from all campaign-related activities pending a formal investigation."

The candidate who the claims are being made against has not been named.

"The woman involved has requested anonymity and we fully respect her wishes," the spokesman said.

"Out of respect for her we don't feel it's appropriate to make any further comment."

The internal probe will be a further blow to the Greens, after they were forced to defend another political candidate over his degrading comments towards women.

The Greens candidate in Footscray, Angus McAlpine, apologised for the lyrics he rapped as the frontman in hip hop outfit Broken Aesthetiks.

The lyrics included lines such as: "Got no class when trying to get some a**, put a rowie [Rohypnol] in your glass and wait for a few minutes to pass" and "date rape drugs in her drink then have my way".

The Greens continued to stand by the former rapper after another video from 2017 showed him making more degrading comments to women.

Another separate Greens candidate has also been under fire for "liking" several Facebook pages that were racist or degrading to women.

The pages included one called, "Twinkle twinkle little slut, name one guy you haven't f**ked".