An amphibious vehicle includes: a hull (1) having a longitudinal axis; an aquatic propulsion element; a terrestrial propulsion element (5a, 5b) mounted on arms (4a, 4b) pivoting about an axis substantially parallel to the longitudinal axis of the hull, and capable of assuming a stowed position when the vehicle moves over water using the aquatic propulsion element, and an extended position in which the vehicle can move on the ground using the terrestrial propulsion element. In the stowed position, the arms (4a, 4b) extend into cavities (3a, 3b) formed in the hull (1), and a portion of the arms (4a, 4b) defines a lid that at least partially closes the cavity (3a, 3b) in the longitudinal direction of the hull bottom (2).