To keep the communication distance of a non-contact data carrier to be stable regardless of the arrangement place of an antenna equipment and also to promote more thinning in the antenna equipment by adjacently arranging a soft magnetic body where an effective and magnetical permeability is more than a specified value at the rear surface of a loop antenna.

The loop antenna 1 is contained in a case 2 which is formed by a synthetic resin material, etc., where the effective and magnetic permeability is close to one. Then, the soft magnetic body 3 is arranged on the whole surface of the rear surface of the loop antenna 1. The effective and magnetic permeability when an exciting frequency band is equal to or below 100kHz is more than 100 in the soft magnetic body 3. The soft magnetic body 3 has the drastically high effective and magnetic permeability. When it is adjacently arranged on the rear surface of the loop antenna 1, an electromagnetic field in the rear part of the loop antenna 1 is drawn into the soft magnetic body 3. Therefore, the limitation of the arrangement place is drastically reduced.