Method for producing aliphatic polycarbonate

Disclosed is a method for producing an aliphatic polycarbonate that is capable of stably producing an aliphatic polycarbonate industrially. Specifically disclosed is a method for producing an aliphatic polycarbonate in which carbon dioxide and an epoxide are copolymerized in the presence of a metal catalyst, wherein the water content present in the polymerization system is 5 mol% or less of the metal catalyst content.