Nationalmuseum (or National Museum of Fine Arts) is the national gallery of Sweden, located on the peninsula Blasieholmen in central Stockholm.

The museum's operations stretches far beyond the borders of Blasieholmen, the nationalmuseum manage the National Portrait gallery collection at Gripshom, Gustavsbergporclain museum, a handful of castle collections and the Swedish Institute in Paris (Institut Tessin). In the summer of 2018 Nationalmuseum Jamtli opened in Östersund as a way to show a part of the collection in the north of Sweden.

The museum's benefactors include King Gustav III and Carl Gustaf Tessin. The museum was founded in 1792 as Kungliga Museet ("Royal Museum"). The present building was opened in 1866, when it was renamed the Nationalmuseum, and used as one of the buildings to hold the 1866 General Industrial Exposition of Stockholm.

The current building, built between 1844 and 1866, was inspired by North Italian Renaissance architecture. It is the design of the German architect Friedrich August Stüler, who also designed the Neues Museum in Berlin. The relatively closed exterior, gives no hint of the spacious interior dominated by the huge flight of stairs leading up to the topmost galleries.

The museum was enlarged in 1961 to accommodate the museum workshops. The present restaurant was instated in 1996. The museum building closed for renovation in 2013 and reopened on 13 October 2018. The $132 million overhaul sought to put more of the museum’s collection on display and to match the security, accessibility, fire safety and climate control of a modern institution.