PROBLEM TO BE SOLVED: To be excellent in heat resistance, flexibility, barrier property and cleanability (low fine particle property), not to be deformed even after sterilization treatment at 121 ° C., to retain high transparency, and to be excellent in workability in water-cooled inflation molding. Provided are a polyethylene resin composition and a medical container using the same. SOLUTION: Linear low-density polyethylene (A) 50 to 89 parts by weight, high-density polyethylene (B) 10 to 40 parts by weight, high-pressure low-density polyethylene (C) 1 to 20 parts by weight having specific physical properties ( A polyethylene resin composition containing (A), (B) and (C) in a total amount of 100 parts by weight and having an MFR of 3.0 to 9.0 g / 10 min. [Selection diagram] None【課題】 耐熱性、柔軟性、バリアー性およびクリーン性（低微粒子性）に優れ、１２１℃での滅菌処理後も変形せず、高い透明性が保持され、かつ水冷インフレーション成形における加工性に優れるポリエチレン系樹脂組成物およびこれを用いた医療容器を提供する。【解決手段】 特定の物性を有する直鎖状低密度ポリエチレン（Ａ）５０～８９重量部、高密度ポリエチレン（Ｂ）１０～４０重量部、高圧法低密度ポリエチレン（Ｃ）１～２０重量部（（Ａ）、（Ｂ）、（Ｃ）の合計は１００重量部）を含み、ＭＦＲが３．０～９．０ｇ／１０ｍｉｎを満足するポリエチレン樹脂組成物。【選択図】 なし
