A super elastic alloy containing: as essential additive elements, Au of 8.0 mass% or more and 20.0 mass% or less, at least either of Cr and Mo； Ta as an optional additive element； and the balance being Ti and inevitable impurities, wherein an equivalent amount of Cr calculated based on a following formula in terms of a relationship among contents of Cr, Mo and Ta is within the range of more than 5.0 and less than 8.0. The alloy is a Ni-free super elastic alloy, which has a good X-ray imaging property. Hence, the alloy is suitably applicable to the field of medicine.[Formula 1] Equivalent amount of Cr=[Cr content (mass%)]+([Mo content (mass%)]/1.7)+([Ta content (mass%)]/15)本發明係一種超彈性合金，其包含8.0質量%以上、20.0質量%以下的Au，以及Cr與Mo的至少任一種作為必要添加元素，且包含Ta作為任意添加元素，而剩餘部份為Ti及無法避免之雜質所構成；其中Cr含量、Mo含量與Ta含量的關係，係根據下式算出Cr當量為大於5.0、小於8.0的範圍。此合金係一種不含Ni的超彈性合金，且X光成像性良好。因此，該合金可適用於醫療領域。【式1】Cr當量=[Cr含量(質量%)]+([Mo含量(質量%)]/1.7)+([Ta含量(質量%)]/15)
