Abstract: A painting method and a painting apparatus are disclosed, in which a few kinds of five to eight primary color paints are transferred along corresponding paint-transferring lines, and at a primary color paint selecting/extracting unit 6 provided at an intermediate of the painting apparatus 1 necessary primary color paints are selected and extracted for a certain amount and transferred into a paint-transferring passage 5, and then the extracted primary color paints are mixed at an agitating unit 7 provided at an intermediate of the paint-transferring passage 5 such that a suitable color paint having a certain viscosity is prepared. The suitable color paint thus prepared is then transferred to a spray gun G. A washing unit C is provided at the beginning end of the paint-transferring passage 5. When changing the color paint, the common paint-transferring passage 5 is cleaned by washing liquid ejected from the washing unit C.