Carnivorous fans flocking to Madison Square Garden to see rocker Morrissey next month will be forced to go vegan or go hungry — because the arena is giving in to his demands to ban meat at the performance.

The former frontman for the British band The Smiths — which had a smash-hit album called “Meat Is Murder” — is scheduled to perform June 27.

Concertgoers craving a burger or hot dog will be asking, “Where’s the beef?” after the singer revealed that the Garden had agreed that only vegan foods would be served during the show.

So no meat — but also no dairy and no fish.

“Serving meat and dairy products at an event to combat climate change is like selling pistols at a gun control rally,” Morrissey said in an open letter to Al Gore, in which he blasted the former vice president for ignorantly sponsoring the Earth Live concert series this year without banning meat products.

“Not only is it possible for venues to provide a 100 percent meat-free menu — as is done now at every concert venue in which I perform, including Madison Square Garden, where I have a show at the end of June — it’s also a moral duty.”

The decision to go vegan will be a far cry from what red-meat-loving Knicks and Rangers fans are used to.

The Garden has a wide range of food choices, many featuring mounds of meat, including a Carnegie Deli and an Uncle Jack’s Steak Sandwich shop.

One staffer at MSG responded with disbelief when told of the meat ban.

“We’d have to close half the floor,” the staffer said.

And anyone thinking of sneaking in a pastrami sandwich should note that Morrissey had security personnel search fans for such “contraband “ during a UK tour in 2011, according to the Mirror.

While MSG officials declined to comment about their culinary accommodation, restaurateur Drew Nieporent, owner of Daily Burger inside the arena, said he has no problem following Morrissey’s anti- meat rules.

“This is the first time I’m hearing about it,” Nieporent said. “But I love my man Morrissey. He’s a wonderful artist, so I wouldn’t mind. He can do whatever he wants.”

Nieporent said he hasn’t planned a vegetarian menu because he’s going to just shut down for the night.

“We’ll just go and enjoy the music,” he said.