Montreal Forum (French: Le Forum de Montréal) is a historic building located facing Cabot Square in Montreal, Quebec, Canada. Called "the most storied building in hockey history" by Sporting News, it was an indoor arena which served as the home of the National Hockey League's Montreal Maroons from 1924 to 1938 and the Montreal Canadiens from 1926 to 1996. The Forum was built by the Canadian Arena Company in 159 days. Today most of the Forum building is now a multiplex cinema at first as AMC Forum managed by AMC Theatres and later by Cineplex Entertainment as Cineplex Cinemas Forum (French: Le Cinémas Cineplex Forum).

Located at the northeast corner of Atwater and Ste-Catherine West (Metro Atwater), the building was historically significant as it was home to 15 Stanley Cup championships: twelve for the Canadiens and one for the Maroons (for whom the arena was originally built); one for the visiting New York Rangers and Calgary Flames respectively. The Forum was also home to the Montreal Roadrunners and Montreal Junior Canadiens.