. . "In the present invention, the polyamide resin containing metaxylene group is a polymer containing at least 70 mol % in the molecular chain of the constituent units composed of metaxylene diamine, or mixed xylene diamine containing metaxylene diamine and paraxylene diamine (not more than 30% thereof), and ??, ??-aliphatic dicarboxylic acid with 4 to 10 carbon atoms." . .