A supersonic aircraft comprising a fuselage having a front end, a base line, a fin portion and a nose portion, said nose portion having a front boundary and a rear boundary, the contour of the cross-section of the nose portion, except for the front end of the fuselage being defined by two circles of different radii, the circles being disposed one above the other, the radius of the lower circle being 1.3 to 1.7 greater than the radius of the upper circle, a cabin floor at the level of the intersection of the two circles serving as a boundary between the circles, the width of the cross-section exceeding the height whereby the bearing characteristics of the fuselage are improved and the aerodynamic center of the aircraft is shifted insignificantly when switching from subsonic speed to supersonic speed, a delta wing disposed in the middle portion of the fuselage, the wing having a front edge, engines under the middle portion of the wing, the intersection of the two circles gradually passing to the front edge of the wing at the sides of the nose portion of the fuselage to provide for uniform conditions of vortex formation, raise the bearing characteristics of the wing and the longitudinal and directional stability, the small limit referring to the front boundary of the nose portion and the greater limit to the rear boundary of the nose portion, and the longitudinal axis of the section of the nose portion of the fuselage at its front end and including the front end being inclined downwardly relative to the base line of the fuselage at an angle of 4.degree. - 6.degree. to increase the pilot's field of vision.