1938 Bolivian legislative election

Constituent Assembly elections were held in Bolivia on 13 March 1938. Prior to the elections, an electoral alliance named the Socialist Single Front (FUS) was formed by the Legion of Veterans, Confederation of Bolivian Workers, Workers' Party, Popular Front of Potosí, United Socialist Party, Republican Socialist Party, and Independent Socialist Party. The FUS won 96 of the 103 seats in the Chamber of Deputies and all 18 seats in the Senate.

Aftermath
On 27 May 1938 the Constituent Assembly elected Germán Busch as president. Busch had assumed the presidency on 13 July 1937 as a result of a coup d'état.

The Assembly was dissolved by Busch on 24 April 1939.