Abstract: A process of detecting the position of generation of electric discharge between a discharge electrode of an electric discharge machine and a work. The process comprises the steps of branching a pulse discharge current into two or more branch power supply lines and supplying discharge current divisions to a discharge electrode from two or more points through the respective branch power supply lines, detecting the discharge current divisions in the branch power supply lines, calculating the peak value of each of the discharge current divisions at the time of rising of the pulse discharge current, standardizing the peak value of each of the discharge current divisions, and calculating electric discharge generation position according to the standardized peak value. In this process, the electric discharge generation position detection is performed without restriction imposed by the pulse length or by the electrode material.