a new type of exact element method for calculation of natural frequencies of tightly stretched cable network structures is presented. Some of the theoretical aspects of the dynamic element method (DEM) are considered. Then the element formulation of dynamic element method of taut string is presented. Only motions within the vertical cable plane are regarded. The global matrices are assembled by a summation process same as the conventional finite element method. Three illustrative cable network structures are discussed to demonstrate the implementation of the current method. Solutions show that the results from using the DEM were more accurate than with the conventional finite element method especially on high order frequencies.