To provide a flood protection device capable of quickly and surely intercepting infiltration of water with easy placement of a waterproof sheet and low in cost with simple structure.

The flood protection device with the edged waterproof sheet has a simple edged structure allowing the waterproof sheet to be securely fixed in a watertight state and prevents the flood damage at a low cost. The flood protection device comprises a sheet support 3 for self-forming/supporting a flexible waterproof sheet material 4. A belt-like anchor fitting 2 bored with anchor holes 8 for anchor hooks and anchor holes 9 for fixing the sheet support is fixed to a floor part 17 of an anchor fitting foundation by anchors 16. An anchor edge part 1 abutting on the anchor fitting 2 is composed of a strip core material 5 of plate-like cross section mounted with an elastic member 6, anchor hooks 7 and a cut-off rib 12. Watertightness through consolidation is obtained by pressure-fitting with the pressure and weight of water.