An expanded polyamide resin molding obtained by using a polyamide resin composition comprising: a polyamide resin; a glycidyl group-containing styrene copolymer having two or more glycidyl groups per molecule, a weight average molecular weight of 4000 to 25000, and an epoxy value of 400 to 2500 Eq/1 × 10 6 g; and an inorganic reinforcing material in a proportion such that the content of the glycidyl group-containing styrene copolymer is 0.2 to 25 parts by mass and the content of the inorganic reinforcing material is 0 to 350 parts by mass relative to 100 parts by mass of the polyamide resin, wherein an expanded layer composed of a continuous resin phase and closed foam cells having an average cell diameter of 10 to 300 μm and an unexpanded skin layer stacked on the expanded layer and having a thickness of 100 to 800 μm are formed of the polyamide resin composition, and the expanded polyamide resin molding has a specific gravity of 0.2 to 1.0, the weight average molecular weight of the glycidyl group-containing styrene copolymer is measured by GPC analysis in terms of polystyrene, the epoxy value of the glycidyl group-containing styrene copolymer is measured, by preparing a solution containing the glycidyl group-containing styrene copolymer, tetraethylammonium bromide reagent, and crystal violet indicator, followed by titration with 0.1N perchloric acid, and calculating the epoxy value of the glycidyl group-containing styrene copolymer based on the following formula where the amount (mL) of the perchloric acid needed for titration is represented by A, the weight of the glycidyl group-containing styrene copolymer is represented by W (g), and the normality of the perchloric acid reagent is represented by N Epoxy value Eq / 1 × 10 6 g = N × A × 1000 / W. a polyamide resin; a glycidyl group-containing styrene copolymer having two or more glycidyl groups per molecule, a weight average molecular weight of 4000 to 25000, and an epoxy value of 400 to 2500 Eq/1 × 10 6 g; and an inorganic reinforcing material in a proportion such that the content of the glycidyl group-containing styrene copolymer is 0.2 to 25 parts by mass and the content of the inorganic reinforcing material is 0 to 350 parts by mass relative to 100 parts by mass of the polyamide resin, wherein an expanded layer composed of a continuous resin phase and closed foam cells having an average cell diameter of 10 to 300 μm and an unexpanded skin layer stacked on the expanded layer and having a thickness of 100 to 800 μm are formed of the polyamide resin composition, and the expanded polyamide resin molding has a specific gravity of 0.2 to 1.0, the weight average molecular weight of the glycidyl group-containing styrene copolymer is measured by GPC analysis in terms of polystyrene, the epoxy value of the glycidyl group-containing styrene copolymer is measured, by preparing a solution containing the glycidyl group-containing styrene copolymer, tetraethylammonium bromide reagent, and crystal violet indicator, followed by titration with 0.1N perchloric acid, and calculating the epoxy value of the glycidyl group-containing styrene copolymer based on the following formula where the amount (mL) of the perchloric acid needed for titration is represented by A, the weight of the glycidyl group-containing styrene copolymer is represented by W (g), and the normality of the perchloric acid reagent is represented by N Epoxy value Eq / 1 × 10 6 g = N × A × 1000 / W.