as is apparent from comparison of fig1 with fig3 the wire cut electric discharge machine according to the invention can be obtained by adding a specific resistance specifying unit 25 to the conventional wire cut electric discharge machine shown in fig3 the specific resistance specifying unit 25 is used to specify a specific resistance for a machining solution with the wire cut electric discharge machine thus constructed before an electric discharge machining operation the machining solution must be jetted through the nozzle 17 or the filtered machining solution must be stirred using the specific resistance control unit 10 until the specific resistance of the machining solution reaches a target value because the electrolyte contained in the machining solution allows the flow of electric current and depending on the current the specific resistance of the machining solution is changed that is the specific resistance affects the machining performance of the electric discharge machine the operation of the wire cut electric discharge machine according to the invention will be described with reference to fig2 a flow chart prior to the analysis of a numerical control program hereinafter referred to as 34 an nc program 34 when applicable provided by the paper tape input output unit 2 or by the input output device 5 the cpu 7 operates to initialize the memory 1.