Mr Greer said he would be ‘unbelievably proud’ to serve as deputy to his party co-leader Gillian Mackay.
Scottish Green co-leader Ross Greer has said he is “not interested” in becoming First Minister.
Mr Greer co-leads the Scottish Green Party with Gillian Mackay – whom he said he would happily serve as deputy first minister.
The most recent YouGov poll predicted the Scottish greens could win 11 seats in the election, meaning they would need to gain a significant amount of support to beat the SNP’s predicted 67 seats.
Speaking to the Press Association, Mr Greer said: “I am quite genuinely not interested in becoming the first minister of Scotland, and I would be unbelievably proud to serve as the deputy to first minister Gillian Mackay.
“I have a style of politics that I think leans towards just getting stuck into the details and back rooms and make sure that policies get delivered.”
Mr Greer was the youngest MSP elected in the 2016 election at 21 years old.
He has been a member of the Scottish Greens since he was 15 and was a member of the Scottish Youth Parliament, representing the Clydebank and Milngavie constituency between 2011 and 2013.
He rose to be leader of the party in 2025 alongside Ms Mackay.
Ms Mackay is the only female party leader on the campaign trail and has served as co-leader of the party since last August, having given birth to her first child in June.
Her work in Parliament has often focused on social justice and health, which Mr Greer said would be the reason Ms Mackay would be the “kind of politician” the people of Scotland would want.
Mr Greer continued: “I think Gillian Mackay is the kind of politician that the people of Scotland want to see.
“Gillian has the depth of knowledge about areas of public policy that people really care about, like our NHS, and the kind of compassion that we should want to see in our political leaders.
“So, as much as we co lead the party on an equal basis, in the event that we are facing a Green majority government on the seventh of May, I will probably be calling her from my count to her count to congratulate Scotland’s first Green first minister, Gillian Mackay.”
Mr Greer told the Press Association he had not told Ms Mackay of his plans, he said: “I’ve not told her yet that yet, though, breaking the news to Gillian that she will be the next first minister through PA Media.”
The party announced its manifesto on Tuesday with pledges to improve childcare, offer free bus travel to all and a hard stance on no new North Sea oil and gas drilling.
The Scottish Greens have previously worked alongside the SNP in government to successfully achieve a number of policies including ending peak rail tickets.
While the latest YouGov poll shows the SNP is predicted to win 67 seats and an outright majority, if they fell short of that, that could open the way for another deal with the Scottish Greens, who are predicted to pick up 11 seats.
However, Mr Greer said that the Scottish Greens would only join a government “serious about tackling the climate emergency”.
He said: “Clearly, if we’re in the event of government formation and the Greens are invited into that, we would only join a government that was serious about tackling the climate emergency.
“Licensing decisions in the North Sea are reserved to the UK government, but there are huge areas where the Scottish government could be taking more action to tackle the climate crisis.
“What the Greens want to see is a real focus on investment in the sectors that will create high-quality jobs in green industries, whatever decisions governments of any stripe make in Edinburgh or in London, North Sea oil and gas is in decline.
“People are losing their jobs already. We need to replace those jobs. We need to give people new jobs to move into so the Greens would want to be part of the government double down on investment in renewables, in the clean heat sector.”
