An electrostatic atomizer (1) is attached to the distal end of an arm (17) of a painting robot to change the direction of paint sprayed from it, following to movements of a wrist portion (17a) of the arm (17). The electrostatic atomizer 1 includes a high voltage generator (4) that is supplied with electric power via a low voltage cable (16) extending through the arm (17). The low voltage cable (16) has an elastically shaped portion (16a) at least as a part thereof. The elastically shaped portion (16a) absorbs torsional or tensile force produced in the low voltage cable (16) under rotations of the wrist portion (17a) of the arm (17) and thereby prevents breakage of wires in the low voltage cable (16).