An electronic device comprising a casing; a conductive body located within the electronic device, an end portion of which faces an inner peripheral wall of the casing; and an antenna apparatus which is incorporated in the electronic device and which is enabled to perform communication by receiving a magnetic field transmitted from a transmitter outside the electronic device; characterized in that the antenna apparatus comprises: an antenna coil which is wound in a clearance between the end portion of the conductive body and the inner peripheral wall of the casing the antenna coil being configured to be inductively coupled with the transmitter when the transmitter is located opposite to the conductive body; wherein the antenna coil is disposed upon being inclined with respect to a surface opposing the transmitter with an end portion on the conductive body side being a central axis; wherein the electronic device further comprises a magnetic sheet for drawing a magnetic field transmitted from the transmitter into the antenna coil, wherein the antenna coil is formed by using a signal wire on a printed circuit board, and wherein the antenna coil and the magnetic sheet are superposed with respect to each other so as to satisfy both conditions of arrangement, namely a condition of disposing the magnetic sheet to be located further to the transmitter side than the antenna coil on a central side of a casing surface opposing the transmitter and a condition of disposing the antenna coil to be located further on the transmitter side than the magnetic sheet on the outer peripheral side of the casing surface with the magnetic sheet being inserted into a central portion of the antenna coil formed on the printed circuit board. a casing; a conductive body located within the electronic device, an end portion of which faces an inner peripheral wall of the casing; and an antenna apparatus which is incorporated in the electronic device and which is enabled to perform communication by receiving a magnetic field transmitted from a transmitter outside the electronic device; characterized in that the antenna apparatus comprises: an antenna coil which is wound in a clearance between the end portion of the conductive body and the inner peripheral wall of the casing the antenna coil being configured to be inductively coupled with the transmitter when the transmitter is located opposite to the conductive body; wherein the antenna coil is disposed upon being inclined with respect to a surface opposing the transmitter with an end portion on the conductive body side being a central axis; wherein the electronic device further comprises a magnetic sheet for drawing a magnetic field transmitted from the transmitter into the antenna coil, wherein the antenna coil is formed by using a signal wire on a printed circuit board, and wherein the antenna coil and the magnetic sheet are superposed with respect to each other so as to satisfy both conditions of arrangement, namely a condition of disposing the magnetic sheet to be located further to the transmitter side than the antenna coil on a central side of a casing surface opposing the transmitter and a condition of disposing the antenna coil to be located further on the transmitter side than the magnetic sheet on the outer peripheral side of the casing surface with the magnetic sheet being inserted into a central portion of the antenna coil formed on the printed circuit board. an antenna coil which is wound in a clearance between the end portion of the conductive body and the inner peripheral wall of the casing the antenna coil being configured to be inductively coupled with the transmitter when the transmitter is located opposite to the conductive body; wherein the antenna coil is disposed upon being inclined with respect to a surface opposing the transmitter with an end portion on the conductive body side being a central axis; wherein the electronic device further comprises a magnetic sheet for drawing a magnetic field transmitted from the transmitter into the antenna coil, wherein the antenna coil is formed by using a signal wire on a printed circuit board, and wherein the antenna coil and the magnetic sheet are superposed with respect to each other so as to satisfy both conditions of arrangement, namely a condition of disposing the magnetic sheet to be located further to the transmitter side than the antenna coil on a central side of a casing surface opposing the transmitter and a condition of disposing the antenna coil to be located further on the transmitter side than the magnetic sheet on the outer peripheral side of the casing surface with the magnetic sheet being inserted into a central portion of the antenna coil formed on the printed circuit board.