This invention provides a resin composition comprising a polyolefin-based polymer and an aliphatic polyester-based polymer, which has an excellent balance of impact resistance and rigidity and excellent properties, such as processability. The resin composition comprises a polyolefin-based polymer (A), an aliphatic polyester-based polymer (B), an elastomer (C), which has a melt flow rate (MFR), measured at 190° C. under a load of 21N, of 0.5 to 3.0 g/10 minutes, and an epoxy group-containing polyolefin-based polymer (D).