A floating levee sheet which prevents the river water from overflowing the levee, and a plurality of which are interconnected to cover the waterside levee slope comprising; a watertight sheet body that forms an internal space by being upwardly folded at the upper end; and a loading bag section constructed at the lower end of the sheet body with an open top portion; and a float which is fixed on the sheet body in the across-the-width direction at the upper part of the internal space, and is filled with air and hermetically sealed; and a plurality of joining members whose one end is secured to the upper end of the sheet body, and whose other end comprises an anchoring section to be anchored to the levee top over the anchoring section of the sheet body, and through the intervals of which the overflowing water enters the internal space.