The Musketeers of the military household of the King of France (Mousquetaires de la maison militaire du roi de France), also known as the Musketeers of the Guard (French: Mousquetaires de la garde) or King's Musketeers (Mousquetaires du roi), were an elite fighting company of the military branch of the Maison du Roi, the royal household of the French monarchy.

The Musketeers of the Guard wore an early type of military uniform with a tabard (known as soubreveste), indicating that they "belonged" to the King, and an embroidered white cross denoting the fact that they were formed during the Huguenot rebellions in support of the Catholic cause.

Shortly after the Musketeers were established, a second company was founded to report to Cardinal Richelieu.

In 1664, the two companies were reorganized: one company took the name "Grey Musketeers" (mousquetaires gris) from the color of their matched horses, while the second were called "Black Musketeers" (mousquetaires noirs), mounted on black horses.

With the reforms of Michel le Tellier – which mandated a certain number of years of military service before nobles could attain the rank of officer – many nobles sought to do this service in the privileged Musketeer companies.