This paper presents a simplified data fitting model to predict drying shrinkage 6f concrete, based on about 900 drying shrinkage data accumulated in Japan. The model is consisted of 5 factors; unit water content, unit cement content, relative humidity, volume-surface ratio of member and age at drying. The correlation of these factors was determined by the least square method. The accuracy of this model was verified through comparisons to previous models, such as CEB-FIP 1978, 1990, ACI 209 and JSCE. It was found that the model was quite effective for predicting the drying shrinkage of concrete. This model might be improved by accumulating more data concerned with mechanical properties of aggregate and size effects of concrete members etc.
