<p>An antenna device having a magnetic core (2) that is surface-mounted on a circuit board (1). The antenna device further has a pair of coil sections (A, B) formed spaced apart from each other a predetermined distance d, and the coil sections (A, B) are interconnected by a connection conductor (6). Ends of the magnetic core have a bend extending to the circuit board side on which the magnetic core is mounted. The construction realizes the antenna device for RFID which antenna device is surface-mountable without an increase in the thickness of a housing of a portable electronic apparatus and has high receiving sensitivity.</p>
