The Prussian House of Representatives was the lower chamber of the Landtag of Prussia, the parliament of Prussia from 1850 to 1918. Together with the upper house, the House of Lords, it formed the Prussian bicameral legislature. The Prussian House of Representatives was established by the Prussian constitution of 5 December 1848, with members elected according to the three-class franchise. At first it was called simply the "Second Chamber," with the name "House of Representatives" introduced in 1855.

The Landtag of Prussia was the representative assembly of the Kingdom of Prussia implemented in 1849, a bicameral legislature consisting of the upper House of Lords (Herrenhaus) and the lower House of Representatives (Abgeordnetenhaus). After World War I and the German Revolution of 1918–19 the Landtag diet continued as the parliament of the Free State of Prussia between 1921 and 1934, when it was abolished by the Nazi regime.