A communication apparatus includes: a communication circuit section that processes a high-frequency signal for transferring data; a transfer path for the signal connected to the circuit section; a ground; a coupling electrode supported opposite and away in height from the ground; a resonance section that increases a current flowing into the electrode via the path; and a main body housing that assumes a plurality of placement postures and houses the respective components, one end surface of the housing serving as a reading surface in which the electrode is disposed offset from a center of the reading surface. An infinitesimal dipole is formed from a line segment connecting between a center of a charge in the electrode and a center of an image charge in the ground. The signal is transferred toward a communication partner disposed oppositely to form an angle of substantially 0 degrees with a direction of the dipole.