María Arias Bernal, also known as María Pistolas (1884–1923), was a schoolteacher who was an agitator in the Mexican Revolution under Francisco I. Madero, president of Mexico 1911–1913, until his assassination in a counter-revolutionary coup by Victoriano Huerta. Arias is noted for her defense of Madero's tomb in Mexico City, despite the threat of the Huerta regime.