A data communication apparatus capable of creating a new type of communication is provided. Motion information obtaining means 33 obtains information on the motion of an arbitrary apparatus. An other-party apparatus motion determination section 21 makes a determination as to the motion of the arbitrary apparatus on the basis of the information on the motion of the arbitrary apparatus, the information being obtained by the motion information obtaining means 33. A communication determination section 22 determines whether or not communication is to be performed with an arbitrary apparatus on the basis of the motion determination output by the other-party apparatus motion determination section 21. When it is determined by the communication determination section 22 that communication is to be performed, predetermined data communication is started with the arbitrary apparatus.