The beer, named Harvie's Hoptimistic, is named after the party’s co-convenor Patrick Harvie and was launched this week at vegan Glasgow bar, Mono.
The beer is a bottle-condititioned pale ale with an abv of 4.2%. It has been created for the party by Glasgow-based craft brewery, Jaw Brew.
Speaking to the Press Association, Harvie, whose face adorns the beer’s label, said: “"With our hugely increased membership and some positive poll ratings, what else could we call our beer?
"It's great to know that our hard-working activists will be able to finish a canvassing shift with our very own beer.”
Harvie hopes to become MSP for the Glasgow Kelvin constituency.
Harvie's Hoptimistic Pale Ale retails for around £3.
It is currently available in the Glasgow off-trade at the Good Spirits Wine and Beer Company, Valhalla’s Goat and Hippo Beers, as well as at a number of bars, including Mono.
Zara Kitson, another aspiring Scottish Green Party MSP, said: "As a party we have got a big youth membership and a big following among young people in Glasgow, so there is definitely an appeal to the craft ale drinkers."
Jaw Brew was launched by husband and wife team Mark and Alison Hazell at the Glasgow Real Ale Festival in June 2014.
Two of its cask ales, Drift and Fathom, won silver medals in the 2014 SIBA Scotland Region Competition.
The Green Party’s policies on alcohol include a complete ban on all advertising and higher taxes on both products and profits.