A polyamide resin composition comprising: 10 to 70 % by weight of crystalline polyamide resin with a melting point of 260 to 350 °C determined as heat absorption peak when dissolved measured by using DSC by maintaining temperature at 330 °C for 5 minutes, decreasing the temperature to 23 °C at a rate of 10 °C/min and increasing the temperature at the rate of 10 °C/min, a crystallization temperature of 260 to 320 °C determined as peak of phase transition temperature measured by using DSC by maintaining temperature at 330 °C for 5 minutes and decreasing the temperature to 23 °C at a rate of 10 °C/min, and a glass transition temperature of less than 100 °C determined as second-order endothermic transition point measured by using DSC by maintaining temperature at 330 °C for 5 minutes, decreasing the temperature to 23 °C at a rate of 10 °C/min and increasing the temperature at the rate of 10 °C/min; 10 to 70 % by weight of amorphous polyamide resin with a glass transition temperature of 110 to 200 °C determined as second-order endothermic transition point measured by using DSC by maintaining temperature at 330 °C for 5 minutes, decreasing the temperature to 23 °C at a rate of 10 °C/min and increasing the temperature at the rate of 10 °C/min; 10 to 60 % by weight of inorganic filler being an inorganic fibre; 10 to 50 % by weight of white pigment, based on 100 % by weight of the crystalline polyamide resin, the amorphous polyamide resin, the inorganic filler and the white pigment, and 0.05 to 2 part by weight of light stabilizer, based on 100 parts by weight of the crystalline polyamide resin, the amorphous polyamide resin, the inorganic filler and the white pigment, wherein the inorganic fibre comprises a glass fiber with an average length of 0.1 to 20 mm and an aspect ratio of 10 to 2,000 wherein the aspect ratio is defined as L (average length of the fibre) / D (average diameter of the fibre), and wherein the white pigment comprises titanium oxide, zinc sulfide, white lead, zinc sulfate, or a combination thereof. 10 to 70 % by weight of crystalline polyamide resin with a melting point of 260 to 350 °C determined as heat absorption peak when dissolved measured by using DSC by maintaining temperature at 330 °C for 5 minutes, decreasing the temperature to 23 °C at a rate of 10 °C/min and increasing the temperature at the rate of 10 °C/min, a crystallization temperature of 260 to 320 °C determined as peak of phase transition temperature measured by using DSC by maintaining temperature at 330 °C for 5 minutes and decreasing the temperature to 23 °C at a rate of 10 °C/min, and a glass transition temperature of less than 100 °C determined as second-order endothermic transition point measured by using DSC by maintaining temperature at 330 °C for 5 minutes, decreasing the temperature to 23 °C at a rate of 10 °C/min and increasing the temperature at the rate of 10 °C/min; 10 to 70 % by weight of amorphous polyamide resin with a glass transition temperature of 110 to 200 °C determined as second-order endothermic transition point measured by using DSC by maintaining temperature at 330 °C for 5 minutes, decreasing the temperature to 23 °C at a rate of 10 °C/min and increasing the temperature at the rate of 10 °C/min; 10 to 60 % by weight of inorganic filler being an inorganic fibre; 10 to 50 % by weight of white pigment, based on 100 % by weight of the crystalline polyamide resin, the amorphous polyamide resin, the inorganic filler and the white pigment, and 0.05 to 2 part by weight of light stabilizer, based on 100 parts by weight of the crystalline polyamide resin, the amorphous polyamide resin, the inorganic filler and the white pigment,