Scum accumulation-inhibiting device

The present invention addresses the problem of providing a scum accumulation-inhibiting device for inhibiting the accumulation of scum floating on the water surface of dams, lakes and marshes, water storage tanks, septic tanks, sewage treatment plants, etc. (closed water areas, etc.) and the vicinities thereof to improve the water quality of the closed water areas, etc. with a relatively low-cost and simple configuration. The present invention is a scum accumulation-inhibiting device 1 for inhibiting the accumulation of scum FS, said device comprising: a water flow-generating part 10 that is provided underwater; a depth adjustment part that adjusts the position of the water flow-generating part 10 to a prescribed depth; and a fluid supply part that supplies fluid to the water flow-generating part 10. The depth adjustment part is configured using a float 40 that is fixedly attached to the water flow-generating part 10. The fluid supply part is configured using a fluid supply hose 50 connected to a fluid supply