The crystallization kinetics of glassy GeS 2 was investigated by non-isothermal heat flux differential scanning calorimetry (DSC) on both bulk and powder samples. It was shown that high-temperature modification of germanium disulphide crystallizes from an undercooled melt of composition GeS 2 . The crystallization kinetics can be described by the ~estfik-Berggren (SB) kinetic model, using the Arrhenius dependence of the rate constant. It was found that the Johnson-Mehl-Avrami (JMA) kinetic model is less suitable for the description of the studied crystallization process.A BASIC program has been written for both SB and JMA models to evaluate kinetic data from experimental DSC curves recorded with the Perkin-Elmer Thermai Analysis Data Station system.