The purpose of the present invention is to provide a highly corrosion-resistant Zr-group amorphous alloy composition containing a higher Zr content compared to existing amorphous alloys, and comprising only commercial metal elements, and thereby has superior industrial and economic utility and is easily rendered practical. According to one aspect of the present invention, provided is the Zr-group amorphous alloy composition comprising: 67-78 atomic percent of Zr; 4-13 atomic percent of Al and/or Co; 15-24 atomic percent of Cu and/or Ni, wherein glass forming ability of the Zr-group amorphous alloy composition is at least 0.5 mm.