Metallic glass alloy

Patent Granted PROBLEM TO BE SOLVED: To provide a metallic glass alloy having both of excellent plastic workability and compatibility as a member to be used in a living body. SOLUTION: The noble-metal-based metallic glass alloy for the member to be used in the living body has a composition shown by a general formula Pd<SB>100-a-b-c</SB>Pt<SB>a</SB>Cu<SB>b</SB>P<SB>c</SB>(wherein a, b and c satisfy, by atomic percent, the respective expressions of 12.5<=a<=20.0, 27.0<=b<=37.5 and 20.0<=c<=21.0); has an undercooled liquid region of which the temperature range ([Delta]T=crystallization temperature (Tx)-glass transition temperature (Tg)) is 50[deg.]C or higher;