The B-26 was a shoulder-winged monoplane of all-metal construction, fitted with a tricycle landing gear. It had a streamlined, circular section fuselage housing the crew, consisting of a bombardier in the nose, armed with a machine gun, a pilot and co-pilot sitting side by side, with positions for the radio operator and navigator behind the pilots. A gunner manned a dorsal turret armed with two machine guns (the first powered dorsal turret to be fitted to a U.S. bomber), and an additional machine gun was fitted in the tail.