To solve the problem that the magnetic field of a conductive material prevents the transmission and reception of an antenna when a metal-colored conductive material is provided near the antenna to set appearance to be a metal color, for example, alienation of at least 2 mm from a helical antenna is needed to obtain required performance when carrying out nickel/chrome plating to the appearance section of an insulating section for protecting an helical antenna element for cellular phone apparatus, and hence the dimensions of an antenna apparatus become large for preventing the cellular phone from being miniaturized.

In the antenna apparatus having the antenna element 2 and a decoration section 4 provided near the antenna element 2, the decoration section 4 is deposited so that the insulating material 41 does not come into contact with a particle 42 of the conductive material each other.