The effect of drying method and layer thickness on the drying behaviour of stevia (Stevia rebaudiana B.) leaves and the acceptability of five drying models to predict the drying pattern of stevia were studied. Stevia leaves were dried at different thickness of layers i.e. 1, 1.5 and 2 cm in mechanical drier at varying temperature 50, 60 & 70oC, under sun in open air, simple green house drying and green house drying with north wall reflection. It was observed that the moisture ratio as well as drying rate decreased with increase in drying time in all drying methods with some minor exceptions in drying rate. The drying time varied from 150-900 minutes in different methods. The page model, log model and two term exponential model showed higher adequacy of fit between experimental and predicted data among others. Effective moisture diffusivity of mechanical drying was higher than sun drying and simple green house drying. The effective moisture diffusivity values were found ranging from 2.431×10-7-40.528×10-7 m2/sec for stevia leaves.