The 1970 Memorial Cup was the 52nd annual Memorial Cup competition, organized by the Canadian Amateur Hockey Association (CAHA) to determine the champion of junior A ice hockey. It was a best-of-seven series between the Montreal Jr. Canadiens of the Ontario Hockey Association and the Weyburn Red Wings of the Saskatchewan Junior Hockey League held at the Montreal Forum in Montreal, Quebec. Montreal won their third Memorial Cup, defeating Weyburn four games to none.