To solve the problem that a metal material such as stainless steel used in an ordinary wrist watch is not allowed to be used because it causes a reception fault in an antenna, in a facing component used in an antenna-built- in type radio time piece capable of receiving a prescribed radio wave to correct a time automatically.

A metal film comprising a weak magnetic substance of which the thickness is preferably within a range of 0.3 μm-2 μm is formed on a surface comprising a material wherein a weak magnetic substance powder is dispersed preferably by an amount of 10-40 vol.% in a thermoplastic resin.