To provide a low profile wide-band antenna which has been made light so that it is suitable to be mounted on a mobile object.

A low profile wide-band antenna includes: a conductor plate 11; a radiation element 16 which is formed by positioning plate-like or linear elements in a radial form opposite to the conductor plate 11 and by forming a feeding part 18 of a disk shape or a polygonal shape in the center of the radial form; a short circuit element 17 short-circuit connecting the radiation element 16 and the conductor plate 11; a feeding terminal 14 provided on the conductor plate 11 isolated from the conductor plate 11; a feeding path formed by connecting multiple rod-like or thin plate-like conductors spread from the feeding terminal 14 towards the feeding part 18 in the shape of an open umbrella and connected to the feeding part at almost equal intervals in the circumference.