We propose the Simplified Travel Demand Estimation Model. This model, which is basically extention of the conventional 4 step model, is based on small sample surveys and full use of rich existing PT survey results. Adaptation of this model to Miyazaki City and Utsunomiya City shows that 1) the Simpli-fied Travel Demand Estimation Model is adaptable to these cities with good estimation results, and that 2) three hund-red households are enough to estimate trip generation rates, trip length and disaggregate mode choice models which are the key parts of whole estimation process.