PURPOSE: To prevent the Q of a fixed coil arranged closely to a metallic member in magentic communication equipment comprised of a moving coil and the fixed coil.

CONSTITUTION: A magnetic plate 5 is arranged on a side opposite to a side where the fixed coil 6 is provided confronting with the moving coil 8 and the two-way communication of information is performed. The magnetic plate 5 is formed in the same size or larger than that of the plane of the fixed coil 6, and the center of it is located on the axis of the fixed coil 6, and it is located between a metallic plate, for example, a shield cabinet plate on the back wall 4 of the fixed coil. The magentic plate 5 is formed in such a way that the magnetic field of the fixed coil 6 is prevented from arriving at the metallic plate on the back wall 4, and eddy current loss generated on the metallic plate can dissipate. In this way, it is possible to keep the sensitivity of information transmission constant and to improve reliability for the equipment.