Abstract: Described herein is an electrostatic spray coating machine of the type which has a plural number of supporters (31) at intervals around the circumference of a housing (2) as electrode retainer rods for holding external electrodes (32). Each supporter (31) is formed with an oblique surface (31A) at the fore end thereof to provide a concealing projection (31B) on the inner side of the fore end of the supporter (31). As a result, when seen from the rotary atomizer head (5), the discharge distance (H') betweewn the fore end (32A) of each external electrode (32) and the rotary atomizer head (5) is increased to permit application of a higher voltage to the external electrodes (32).