To provide a screen door cleaning device that does not cause entanglement when operated and that does not lose operability and does not damage the screen door.

This screen door cleaning device comprises the first cleaning member 2 that is operated so as to move along one surface of a screen door and the second cleaning member 3 magnetically attached to the first cleaning member 2 through the screen door, and the second cleaning member 3 is moved along the other surface of the screen door, following the moving first cleaning member 2. In the screen door cleaning device, a cleaning section that is slid along the surface of the screen by the movement of the first cleaning member 2 and the second cleaning member 3 and has the function of collecting water, is provided on the screen side surfaces of the first cleaning member 2 and the second cleaning member 3 respectively. Projections 5 that are located slightly lower than the cleaning section 4 when the first and second cleaning members 2 and 3 are not to be magnetically attached to each other, and that are located nearly at the same height as the cleaning section 4 at a time when both are magnetically attached to each other, are provided nearer the directions of advance of both members 2 and 3 when they move than the cleaning sections 4 of them.