A medical packaging container and a method of producing a polyester used therein, wherein the packaging container contains a polyester resin (A1), and within the polyester resin (A1): 1 to 30 mol% of the diole units are at least one type of unit selected from among diole units having a bridged alicyclic skeleton derived from compounds represented by formula (1), formula (2) and formula (3), and at least 70 mol% of the dicarboxylic acid units are dicarboxylic acid units having a naphthalene skeleton.本發明係關於一種醫療用包裝容器,其含有聚酯樹脂(A1),且前述聚酯樹脂(A1)中,二醇單元中之1~30莫耳%係選自於從式(1)、式(2)及式(3)表示之化合物而來之具有有橋脂環骨架之二醇單元中之至少一種,且二羧酸單元中之70莫耳%以上係具有萘骨架的二羧酸單元,並提供使用於該醫療用包裝容器之聚酯之製造方法。
