The present invention is a Zr-based amorphous alloy composition that has a higher Zr content than conventional amorphous alloys, consists only of commonly used metal elements, has excellent industrial and economic utility, and is easy to put into practical use. The purpose is to provide goods. According to one aspect of the present invention, Zr is selected from 67 atomic% to 78 atomic%, and any one or more selected from Al and Co is selected from 4 atomic% to 13 atomic%, Cu and Ni. In addition, a Zr-based amorphous alloy composition in which any one or more of 15% to 24% by atom and the amorphous forming ability is 0.5 mm or more is provided.
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