Polyester resin composition for light-reflecting article

A polyester resin composition which comprises 30 to 80 wt % of a polybutylene terephthalate resin (A), 10 to 40 wt % of a polyetylene terephthalate resin (B), 0.1 to 40 wt % of a fired kaolin (C) having an average particle diameter of 1.5 mum or less and 0.1 to 40 wt% of a spherical inorganic filler (D). The above polyester resin composition is excellent in the suitability for the direct metal vapor deposition, and a light-reflecting article comprising a formed article from the resin composition and a metal vapor deposition film formed on a part or the whole of the surface of the formed article provides a high brightness feeling and is free from the lowering of the brightness feeling by the occurrence of the blur after the exposure to a high temperature, and thus can be suitably used as ahousing, a reflector or an extension in an automobile lamp, a luminaire in a household electrical appliance, or the like.