To provide a vessel for a medical purpose having heat resistance and high transparency and to obtain a polypropylene resin composition that is suitable for producing the vessel.

The objective vessel is formed from a film with the haze of ≤5% at 23°C and the Young's modulus of ≤30 Kgf/cm2 and subjected to sterilization treatment with pressurized hot water at 125°C for 10 minutes and the resultant vessel causes no film fusing and retains the haze difference of ≤5%. The resin composition suitable for the film formation comprises 65-95 wt.% of polypropylene and 5-35 wt.% of an ethylene-butene-1 copolymer having ≤3.0 Mw/Mn ratio.