PROBLEM TO BE SOLVED: To provide a biodegradable resin film having excellent tear strength and biodegradability.SOLUTION: A biodegradable resin film comprises a mixture of (A) an aliphatic polyester-based resin with a glass transition temperature of -50 to 0°C and (B) a modified epoxidized vegetable oil containing a polymer of an epoxidized vegetable oil in the rate of 10-80 mass%, wherein the ratio of (B) in the mixture is 1-15 mass%.