The 50-year-old victim was attacked on Railway Road in Leigh at about 23:30 BST on Wednesday.
Police said he had personal items stolen from him before an ambulance arrived to take him to hospital, where he later died.
A 31-year-old man has been arrested on suspicion of murder and is being questioned by police.
An investigation has been launched and a cordon is in place near the Oceans Eleven chip shop.
Det Ch Insp Jane Little said: "This was a violent attack and we are appealing for anybody who may have witnessed it or have information on the circumstances surrounding it to please contact police."
A man died after a "violent attack" and robbery by a group of people in Greater Manchester, police said.