Secret Polish Army (Polish: Tajna Armia Polska, TAP) was a Polish resistance movement founded in November 1939 in German-occupied Poland, which was active in the voivodeships of Warsaw, Podlasie, Kielce and Lublin.

Founders were:

• Lieutenant Colonel Jan Henryk Włodarkiewicz "Darwicz" – Chief of the Staff
• Cavalry Captain Witold Pilecki "Witold"
• Lieutenant Colonel Władysław Surmacki [pl] "Stefan"

The organization had up to 19,000 members at its peak.^[when?] In 1940, it joined the Confederation of the Nation. In 1941, it became part of the Polish Home Army.