PURPOSE: To provide a window pane cleaner capable of simply and safely cleaning the inner face and the outer face of a window pane without going outdoors to clean the outer face of the window pane.

CONSTITUTION: This window pane cleaner is provided with a pair of bases 1, 1' each having a cleaning member 2 cleaning the window pane face on one side face, and a magnet is fixed at least on one of a pair of bases 1, 1' so that a pair of bases 1, 1' are attracted to each other. A pair of bases 1, 1' arranged on the inner face and the outer face of the window pane are magnetically attracted to each other via the window pane. When the inner face of the window pane is wiped, the outer face of the window pane can be concurrently wiped, thus the outer face of the window pane can be safely wiped, and the cleaning time can be shortened.