We report the stress‐strain behavior for a Zr65Al10Ni10Cu15 (at.%) glassy alloy with a significant supercooled liquid region of 105 K. The transition temperature from inhomogeneous deformation to a homogeneous one increases with increasing strain rate. The alloy in the supercooled liquid state, however, exhibited the homogeneous deformation even at higher strain rates above 0.5 s−1. The strength was also dependent on the strain rate and independent of temperature in the inhomogeneous deformation region, and was sensitive to both strain rate and temperature in the homogeneous region. The stress‐strain curves in the homogeneous deformation mode were accompanied by a stress overshoot and its height increases with increasing temperature and strain rate.