To provide a waterproof sheet which has high strength, high tear propagation strength and high elastic modulus for its light weight, and further, ease of handling in process.

This waterproof sheet consists substantially of polymer filament based on the repeating unit shown by formula I. In addition, at least, one of the surfaces of a fabric whose relationship between the number of yarns per inch and total fineness each of warp and weft satisfies formula 900 ≥ fiber density (number of pieces/inch)×(total fineness)1/2≥400, is covered with thermoplastic resin or rubber, In the formula, A is part derived from the same or a different ethylene unsaturated hydrocarbon polymerized by the ethylene bond.