The polyamide resin composition according to the present invention contains a polyamide resin (A) wherein an average carbon number of an alkylene group between amide groups is 5 or less and a polyamide resin (B) wherein an average carbon number of an alkylene group between amide groups is more than 5, wherein a ratio by mass (A)/(B) of the polyamide resin (A) to the polyamide resin (B) is from 98/2 to 40/60, and wherein, to 100 parts by mass of a total amount of the polyamide resin (A) and the polyamide resin (B), 0.5 to 20 part(s) by mass of a metal cyanide salt of a composition formula (1) (Ax[M(CN)y]) is compounded.