The 1971 ECAC Hockey Men's Ice Hockey Tournament was the 10th tournament in league history. It was played between March 9 and March 13, 1971. Quarterfinal games were played at home team campus sites, while the 'final four' games were played at the Boston Garden in Boston, Massachusetts. By reaching the championship game Harvard was invited to participate in the 1971 NCAA Division I Men's Ice Hockey Tournament. Clarkson, however, was passed over with Boston University chosen instead as the second eastern representative.