<p>Disclosed is a foam sheet made of a biodegradable resin composition. The biodegradable resin composition contains a wax and/or a polyolefin resin. The biodegradable resin is mainly composed of a polylactic acid. A natural candelilla wax or paraffin wax is preferable as the wax. A polyethylene is preferable as the polyolefin resin. Also disclosed are a foam article and a molded container made of such a foam sheet wherein the degree of crystallinity of the biodegradable resin is not less than 10%.</p>