The Infantry Museum is located near downtown Mikkeli in the old barrack area, which has been preserved in almost its original condition and scope. The barrack area was built according to the plans of Architects E. B. Lohrmann and A. Boman at the end of the 19th century.  Eleven clapboard log buildings are part of the ensemble of wood buildings that have been built in a uniform way. The area also has other buildings and parks with birches growing. The Infantry Museum has three wood barracks at its disposal.

The museum, which was established in 1982, is run by the Infantry Foundation. The artefacts in the collection have been donated by private individuals. In addition, the museum has artefacts it has borrowed from the Military Museum on display. The museum’s diverse exhibitions provide a comprehensive picture of the history of Finland’s infantry. They depict the life of a soldier on both the battlefield and in peacetime in the barracks and on the drill ground. The museum also hosts special collections on a temporary basis.

The main building has an exhibition on the infantry of Independent Finland on display. A display of the army arming itself and events in the 20th century that occurred during the Independence, Winter, Continuation and Lapland Wars. The museum artefacts are supplemented by black-and-white and colour photographs and dioramas of the Battles of Tuulos and Ihantala.

The second building houses special exhibitions. The Karelian Army exhibition and a personal exhibition of General Kustaa Tapola will open in June 2011. The exhibitions are part of the national Continuation War 70 Years theme. Other special exhibitions include SS volunteers in the German Army, Soldiers' Canteen 90 Years, Civil Guard Boys in the Continuation War, and the Infantry Heritage Room. The 130-year history of the museum building is also visible in this building.

The third building displays the special exhibition "60 Years of Peace for the Infantry", the only exhibition in Finland portraying the development after the II World War. The building also hosts an exhibition about peacekeepers. In addition, there are meeting and auditorium facilities in the building.

In connection with the museum, there is also a museum shop and a cafeteria.