Humberside Police said the incident happened in Anlaby at around midnight.
The gang assaulted the 44-year-old man as he removed the takings from his car and then threatened his 43-year-old wife with a paving stone before taking her handbag.
The man suffered minor injuries, which did not require hospital treatment,
A gang of four masked men have attacked a man and his wife outside their East Yorkshire home before stealing the takings from his business.