Spray gun holding mechanism including a holding jaw body (20) having a U-shape with back wall (26), side walls (28,30), outwardly angling support walls on either side (40,42), and mounting means (46,48) by which the device is secured to a painter's roller extension pole on neck (50). A spring loaded trigger adjustment assembly (90) allows a gun secured into the device to be adjusted to the trigger and handle back dimension. A spring loaded trigger rod (62) engages the gun trigger and is actuated by a hand actuated cable (60) at the operator's end of the extension device. Means are provided for quick adjustment of angle of holder disposition, cable (60) slack and spray gun dimensions.