Men's lightweight coxless four competition at the 2008 Summer Olympics in Beijing was held from August 10 to 17 at the Shunyi Olympic Rowing-Canoeing Park. This rowing event is a sweep rowing event, meaning that each rower has one oar and rows on only one side. Four rowers crew each boat, and no coxswain is used. As a lightweight rowing event, rowers were limited to a maximum body mass of 72.5 kilograms each and 70 kilograms on average.