Abstarct: The hydrodynamic coefficients of the aquifer include transferability (T) and storage coefficient (S), which are important parameters in water resources studies and solving many hydrogeological problems such as balance sheets and mathematical models. In this research, the hydrodynamic coefficients of Hamadan aquifer were evaluated by methods of pumping tests, specific capacity and borehole logs. The test data of exploratory wells were analyzed using Cooper-Jacob and Newman methods in Aquiferwin32 software. The difference in transferability values of the exploratory wells dug in 1355 and 1381 is probably due to the large drop in the reservoir level, the decrease in the thickness of the aquifer, and the feeding of the exploratory wells dug in 1355 from the river. The transferability results calculated from the experimental equations baxsed on the average specific capacity data are minimum 326 and maximum 1886 square meters per day. The transferability values calculated baxsed on borehole logs vary from 134 to 690 square meters per day in the aquifer area. The average transfer capability calculated by combining experimental methods of specific capacity ranges from 436 to 1121 square meters per day. A combination of methods has been used to evaluate the transferability of the aquifer, and the values of the transferability of the Hamedan-Bahar aquifer range from 539 square meters per day at the edges of the aquifer to 993 square meters per day in the center of the aquifer. The results obtained from the borehole logs are not within the range of values calculated from other methods, and their results have not been used in combining the methods and estimating the transferability of the Hamadan-Bahar aquifer. The lowest transferability values are observed in the northeast and the highest transferability values are observed in the center of the aquifer, which can be due to the increase in thickness and changes in sediments in these areas. The amount of special water in the Hamedan-Bahar aquifer varies from about 3 to 8 percent.