Abstract: A roll-up screen door apparatus, which is installed between a first door frame member and a second door frame member across a door threshold, includes a roll-up screen assembly which includes a first longitudinal rod, a second longitudinal rod, and a flexible screen connected between the two longitudinal rods. First frame connectors are connected to the first door frame member, and first screen assembly fasteners connect the roll-up screen assembly to the first frame connectors. Second frame connectors are connected to the second door frame member, and second screen assembly fasteners connect the roll-up screen assembly to the second frame connectors. The first frame connectors and the second frame connectors can be threaded eye fasteners which screw into the first door frame member and the second door frame member, respectively. The first screen assembly fasteners and the second screen assembly fasteners can be hook fasteners.