Two men roughed up and robbed a 62-year-old man inside a Queens laundromat, surveillance video shows.

The victim was about to exit Laundryland on Merrick Blvd. in St. Albans on Wednesday when the duo — dressed in all black — dragged him to the ground and stole his watch and $500 in cash, police said.

The assailants then took off down Merrick Blvd.

The suspects are believed to be in their 20s and were wearing black hoodies, police said.