The Prague Castle Guard or simply the Castle Guard is a specific and autonomous unit of the Armed Forces of the Czech Republic directly subordinate to the Military Office of the President of the Czech Republic. Its main task is to guard and defend the seat of the President of the Czech Republic at the Prague Castle.

Prague Castle is a castle complex in Prague, Czech Republic serving as the official residence and workplace of the president of the Czech Republic. Built in the 9th century, the castle has long served as the seat of power for kings of Bohemia, Holy Roman emperors, and presidents of Czechoslovakia. As such, the term "Prague Castle" or simply the "Castle" or "the Hrad" are often used as metonymy for the president and his staff and advisors. The Bohemian Crown Jewels are kept within a hidden room inside it.