The present invention provides a white film comprising a thermoplastic resin composition containing 25-100 parts by mass of an inorganic filler based on 100 parts by mass of a thermoplastic resin, wherein the average reflectance at a wavelength of 400-800 nm is 70% or more, the average linear expansion coefficient in the machine direction and the transverse direction is 35×10−6/° C. or less, and the decreasing rate in reflectance at a wavelength of 470 nm after thermal treatment at 200° C. for 4 hours is 10% or less; and the invention provides a metal laminated body. These exhibit high thermal resistance, high reflectance within visual light range, and small decrease in reflectance under a high heat load environment, but also be applicable for a large sized printed circuit boards for mounting LEDs.