STYRENE FOAM SHEET AND MOLDED ARTICLE USING SAME

Provided are a styrene foam sheet which is formed by foaming a styrene-based resin composition formed by using a styrene-based resin and polylactic acid in combination without impairing the usefulness of each of the styrene-based resin and polylactic acid, and a molded article obtained by performing thermoforming of this. Specifically, there are provided a styrene foam sheet formed by allowing foaming of a styrene-based resin composition containing an impact-resistant styrene-based resin (A), a styrene-acrylic ester copolymer (B), and polylactic acid (C), and a molded article obtained by forming of this. Particularly, it is preferable that a use ratio between the impact-resistant styrene-based resin (A), the styrene-acrylic ester copolymer (B), and the polylactic acid (C) is in a range of 99/1 to 85/15, as a mass ratio represented by [(A) + (B)]/(C), and a mass ratio represented by (A)/(B) is in a range of 60/40 to 90/10.