Abstract: A screen printing method and apparatus for forming a predetermined pattern film, particularly phosphor material stripes for a plasma display panel, and which facilitates design of the screen mask and provides a measure for change of printing conditions, size error due to enlargement or reduction in size of the screen or change of specifications. The method prints printing material on a printing surface using a screen which is extended over a frame and has apertures corresponding to the printing pattern, and includes the steps of applying an external pressure to the frame from at least one side surface to deform the frame, and printing the printing material on the printing surface via the apertures under the condition that size of the apertures has been changed. The apparatus includes a screen having the apertures in the shape corresponding to the printing pattern, a frame for supporting the screen with a predetermined tension, and a device for applying pressure to at least one side surface of the frame.