PROBLEM TO BE SOLVED: To provide a runoff prevention material with a simple structure that can easily eliminate an "unevenness (gap)" between a base zone (vegetation zone) for carrying out vegetation and a slope face to enable a vegetation zone method to be conducted efficiently regardless of seasons.;SOLUTION: A runoff prevention material 10 is installed in the cross direction of a slope face 200 to hold a base zone 20 for carrying out vegetation on the slope face 200. The runoff prevention material 10 comprises a soft part 11 that abuts on the side of the slope face 200 to fill in the gap between the soft part 11 and the slope face 200, and a hard part 12 integrated with and on the soft part 11.;COPYRIGHT: (C)2012,JPO&INPIT
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