According to the present invention, a vinyl chloride resin composition for medical equipment is provided, wherein the composition comprises (a) 0.1 to 30 parts by weight of epoxy compounds, and (b) 0.01 to 1.0 parts by weight of at least one discoloration controlling agent selected from zinc acetylacetonate or zinc dehydroacetate. based on 100 parts by weight of vinyl chloride resin, and the composition can be sterilized by irradiating with an electron beam or γ radiation. Further, according to the present invention, a sterilization treating method of a vinyl chloride resin composition for medical equipment is provided, which includes irradiating the vinyl chloride resin composition for medical equipment with an electron beam or γ radiation.依據本發明，可提供一種可藉由電子線或γ線照射進行滅菌處理之醫療用具用氯乙烯系樹脂組成物，其相對於100重量份之氯乙烯系樹脂含有(a)0.1至30重量份之環氧化合物，以及(b)0.01至1.0重量份之選擇自乙醯基丙酮鋅及脫氫乙酸鋅中之至少一種變色抑制劑。此外，依據本發明，可提供一種對上述醫療用具用氯乙烯系樹脂組成物進行電子線或γ線照射之藉由放射線照射之醫療用具用氯乙烯系樹脂組成物之滅菌處理方法。
