A painting apparatus can suppress generation of air bubbles and non-uniform painting thickness on a painted surface during movement of a painting target. The painting apparatus includes at least one spray gun for spraying a paint toward a painting target; a y-axis movable bar connected to the spray gun so as to move the spray gun vertically; an x-axis movable bar connected to the y-axis movable bar so as to move the spray gun horizontally; a paint supply for supplying the paint to the spray gun; and a conveyor unit for transporting the painting target.