Abstract: In order to study factors that have influences on intention to use public bike-sharing system,and relationships among them,an extended model of is developed on the basis of theory of planned behavior (TPB).In this model,latent variables are attitude,subjective norms,perceived pleasure,flexibility and convenience,and behavioral intention.By analyzing reliability and validity of data obtained from questionnaires,a structural equation model (SEM) of intentions to use bike-sharing is developed,and relations among the factors are obtained.The results show that TPB can be applied to explain the intention of urban residents to use bike-sharing.Subjective norms have the most significant impact on the intention,following by attitude,then by perceived pleasure,while effects of flexibility and convenience is relatively insignificant.