Quinary　Ti-Zr-Hf-Cu-Ni　high-entropy　metallic　glass　thin　films　were　produced　by　magnetron　sputter　deposition.　Nanoindentation　tests　indicate　that　the　deposited　film　exhibits　a　relatively　large　hardness　of　10.4　+/-　0.6　GPa　and　a　high　elastic　modulus　of　131　+/-　11　GPa　under　the　strain　rate　of　0.5　s(-1).　Specifically,　the　strain　rate　sensitivity　of　hardness　measured　for　the　thin　film　is　0.05,　the　highest　value　reported　for　metallic　glasses　so　far.　Such　high　strain　rate　sensitivity　of　hardness　is　likely　due　to　the　high-entropy　effect　which　stabilizes　the　amorphous　structure　with　enhanced　homogeneity.