To provide a filter material cleaning device which cleans a filter material used for purifying a liquid, the filter material cleaning device having improved durability.

The cleaning device 1 includes: an upright outer tube 2; a screw conveyor 4 that is rotatably disposed within the outer tube 2 and that is provided with a spiral blade 18 for transferring a filter material upward from the inlet 36 on the lower end of the outer tube 2 to the outlet 60 on the upper end of the outer tube 2 while rub-washing the filter material; a drive unit 6 for driving the screw conveyor 4 so as to rotate the screw conveyor 4; a control unit 30 for controlling the rotation of the drive unit 6; an introduction pipe 38 for introducing the filter material into the outer tube 2; and a discharge pipe 61 for discharging, from the outer tube 2, the filter material that has been rub-washed in a filtration tank. The cleaning device 1 further includes: a regulating blade 19 which regulates the movement of the filter material in the upward direction, and which is formed coaxially the screw conveyor 4 around the center shaft 20 in a position above the outlet 60; and a cleaning water introduction hole 70 through which cleaning water is introduced, and which is disposed within the outer tube 2 in a position above the regulating blade 19.