Mons Memorial Museum (MMM) is a museum located in Mons, Hainaut Province in Belgium focusing on the military history of the region, with particular focus on World War I and World War II.
Formerly known as the Museum of Military History of Mons (), the museum was opened in 2015 in the year that Mons was a joint European Capital of Culture. It is located in the former municipal water pumping station known as the Machine-ÃÂ -Eau () built in 1871 which was extended as part of the museum project.
The museum's permanent collection includes more than 5,000 artefacts and is displayed over .
It also hosts regular temporary exhibitions. For example, in July 2025, a temporary exhibition opened called 'L'esprit carcéral', focusing on four people once imprisoned in Mons prison: the 19th century French poet Paul Verlaine, poet and World War Two Belgian Resistance member Marguerite Bervoets, her resistance colleague Cécile Detournay, and their contemporary, Fernand Dumont, a Belgian poet, lawyer and resistance writer.