With the aim of developing a new bulk glassy alloy which can be applied to biomedical applications, we examined glass-forming ability and mechanical properties of Ni-free glassy alloys in Pd_50−xPt_xCu₃₀P₂₀ system. As a result, the best glass-forming composition is located at Pd₃₅Pt₁₅Cu₃₀P₂₀, and the alloy can be formed into bulk glassy rods with diameters of up to at least 30 mm by fluxed water quenching. For the bulk glassy alloy, fracture strength, fracture elongation and Young’s modulus were measured to be 1590 MPa, 1.8% and 99.8 GPa, respectively, under a compressive stress and 1410 MPa, 1.7% and 83.0 GPa, respectively, under a tensile stress. These features of high glass-forming ability and good mechanical properties are expected to be used as biomedical materials.