The visit included a tour of the various parts of the brewery, where the Prime Minister was able to see first-hand the brewing process behind Greene King’s ales.
The visit ended at the brewery's Beer Café, where Cameron answered questions from a number of the Greene King team about the upcoming EU referendum.
Rooney Anand, Greene King chief executive, said: “We were delighted to host the Prime Minister at our Bury St Edmunds brewery today as part of his wider visit to the region. The Prime Minister had the opportunity see first-hand how our fine real ale is brewed.
"Members of the Greene King team enjoyed sharing their passion for brewing and asking the Prime Minister questions about the referendum to help them make a decision about how to vote on 23 June.”
The visit follows former London Mayor and MP Boris Johnson visiting St Austell brewery in Cornwall last month, as part of his tour of the region campaigning for Britain's exit of the EU.
Despite the visit, St Austell said it was not endorsing the 'out' camp - and was looking to grow it's overseas business.