PROBLEM TO BE SOLVED: To provide an excellent medical propylene-ethylene-based resin composition and an injection molded article thereof good in moldability during injection molding, excellent in a balance of rigidity and shock resistance, low temperature shock resistance, low debris occurrence and transparency, especially excellent in shock resistance and low leachability after radiation sterilization, and satisfying 6 chemical requirements described in JIS T3210:2011 sterilized injection syringe, or a heavy metal test, a lead test, a cadmium test and an eluate test described in Notification No.494 of the Pharmaceutical Affairs Bureau, a quality and test method of a blood circuit in dialysis type artificial kidney apparatus approval standard IV, after the radiation sterilization.SOLUTION: There is provided a medical propylene-ethylene-based resin composition consisting of a propylene-ethylene copolymer (A) having the ethylene content of 0.1 to 3 wt.%, a melt flow rate (MFR) according to JIS K 7210 (230°C, 2.16 kg load) of 10 to 300 g/10 min and a propylene-ethylene copolymer (B) having the ethylene content of 5 to 20 wt.% and MFR of 1 to 50 g/10 min. The weight ratio of the propylene-ethylene copolymer (A) and the propylene-ethylene copolymer (B) is 90:10 to 60:40, and the ethylene content in the medical propylene-ethylene-based resin composition is 2 to 8 wt.%.
