A man who tried to intervene in the theft of handbags at a pub in Sydney's southwest over the weekend had the tip of his finger bitten off by the alleged thief.

It's believed that a wedding party were celebrating at the Court Tavern on Railway Street in Campbelltown when the 47-year-old victim spotted another man reportedly attempting to steal bags from a table.

When he stepped in to stop the 42-year-old man, a brawl erupted and the man was injured.

"[The bride and groom] were just about to leave as it all went down," a worked told The Daily Telegraph. "There would have been around 30, 40 people. 

"They just came after the wedding and had some drinks here, that's all they did."

A police spokesperson added: "There was an altercation between the men and other patrons during which it is alleged the 47-year-old man had the tip of his finger bitten off."

The victim was taken to Liverpool Hospital for treatment while the 42-year-old was charged with reckless grievous bodily harm.

He is due to appear in court later today.

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