To provide a pollution material purifying device and a pollution material purifying system in which the device can be easily protected in a rough weather, and organic pollution material accumulated sludge deposited at the bottom of water can be efficiently purified with the reduced energy cost.

The pollution material purifying device 1 purifies organic pollution material accumulated sludge deposited at the bottom of water in a treated water region with a pressurized fluid supplied from a pressurized fluid supplying device 2, and includes a pressurized fluid supplying tube 11 for supplying the pressurized fluid to the pollution material accumulated sludge. One end 111 of the pressurized fluid supplying tube 11 is extended to the vicinity or inside of the pollution material accumulated sludge, and supplies the pressurized fluid to the pollution material accumulated sludge to agitate the pollution material accumulated sludge. The other end 112 of the pressurized fluid supplying tube 11 has a connection part detachable to the pressurized fluid supplying port 21 included in the pressurized fluid supplying device 2.