The Czech Armed Forces (Czech: Armáda České republiky, 'the Army of the Czech Republic'), also known as the Czech Army, is the military service responsible for the defence of the Czech Republic as part of the Armed Forces of the Czech Republic (Czech: ozbrojené síly České republiky) alongside the Military Office of the President of the Republic and the Castle Guard. The army consists of the General Staff, the Land Forces, the Air Force and support units.

Czech Army's main historical legacy and inspiration stems from the 15th century Hussite militia, which is credited with numerous warfare advancements, including introduction of firearms to field battles as well as the wagon fort strategy, called vozová hradba in Czech. Modern history precedes the 1918 Czechoslovak declaration of independence with formal establishment of the Czechoslovak Legion fighting on the side of the Entente powers during the WW1. Following the Munich Agreement, the country was occupied by Nazi Germany and the Army was reconstituted in exile, fighting on the side of Allies of World War II in the European as well as Mediterranean and Middle East theatre. After the 1948 Communist Coup, the Czechoslovak People's Army with over 200,000 active personnel and some 4,500 tanks formed one of the pillars of the Warsaw Pact military alliance.

Following the Velvet Revolution and dissolution of Czechoslovakia, the Czech Republic joined NATO in 1999. The conscription was abolished in 2004, leading to transformation into a modern professional army inspired mostly by the British Armed Forces and USMC example. Today, the Czech Army has 28.000 professional personnel and 4.200 members of active reserves. Additionally, any citizen can voluntarily join a five week basic training without becoming a soldier or join advanced shooting training with their privately owned firearms and become civilian reservist.

A law adopted in June 2023 stipulates that the military expenditures shall not be lower than 2% of country's GDP, starting from 2024.