Abstract: A roll-up screen door appliance for drawing a screen panel horizontally across the span of a door frame, which advantageously may be stably positioned in a partly open position for permitting persons to pass through with a minimum opening, thereby reducing the opening size for entry of insects. The screen panel is rolled up on a spring-biassed, vertically-oriented supply roller and is withdrawn by a manually moved pull rod clamped to the distal end of the screen panel. The pull rod is frictionally held in a stable position across the span of the accompanying door frame as it is withdrawn and the friction is overcome manually as the screen is retracted upon the storage roller by a spring biassed mechanism.