This paper deals with the estimation of bearing capacity of cast-in-place pile based on the CPT-data. In order to propose the method, 11 in-situ loading test results on cast-in-place piles and the CPT-data obtained at the same sites of loding tests were used. The comparison between the results of loading test and the estimations based on CPT-data using proposed equation, shows fairly good agreement. Moreover, it was confirmed that the bearing capacity presumed by this method has a high safety index in the design revel II of the reliability based design.