The men's eight was a rowing event held as part of the Rowing at the 1912 Summer Olympics programme. It was the fourth appearance of the event. The competition was held from Wednesday to Friday, 17 to 19 July 1912. Ninety-nine rowers (11 boats) from eight nations competed. Nations were still permitted to have two boats each in the event. The event was won by the Leander Club of Great Britain, successfully defending their 1908 Olympic title. Silver also went to Great Britain, with the New College Boat Club the second British boat. Germany earned its first medal in the men's eight with a bronze by the (Berlin rowing club of 1876). The final was marred in controversy when Leander's team acted outside the customary convention after the coin toss.