With the object of providing an electronic device having good radio signal receiving characteristics with a metal outer case housing therewithin an antenna section without restrictions imposed with regard to material or design, an electronic device minimally having an antenna section 32, an information processing means 33 for processing information that is captured by the antenna section 32, and a metal outer case 31, which houses therewithin the antenna section 32 and the information processing means 33, wherein the metal outer case is configured so that the antenna section 32 can receive magnetic flux from outside via the metal outer case 31 and can resonate, the metal outer case 31 minimally comprising a metal case body member 45 and a metal caseback member 41, and wherein a joining and fixing portion 400 between the metal case body member 45 and the metal caseback member 41 is not provided at a location or in the vicinity of at least a location opposite the substantially center part of the antenna section 32.