Cauliflower florets of 4 cm size were dried at three different drying air temperatures viz., 55, 60, and 65°C, with60 m.min-1 of drying air velocity. The drying data were fitted to different semi-theoretical and empirical modelsviz., Newton, Page, Henderson and Pabis, Logarithmic, two-term, two-term exponential, Verma et al., ModifiedHenderson, Midilli, and Wang and Singh models, based on the moisture ratios. The Midilli model was the bestfit over other models and satisfactorily described the thin-layer drying characteristics of cauliflower. Theeffective diffusivity varied from 12.37 X 10-9 to 3.77 X 10-9 m2.s-1 over the temperature range studied. Thetemperature dependence of the diffusivity coefficient was described by the Arrhenius-type relationship. Theactivation energy for moisture diffusion was found to be 42.41 kJ. Mol-1.