SANITARY CLEANING DEVICE

A sanitary cleaning device (1) comprising a nozzle (40), a water supply path (50), a backflow prevention mechanism (90), a solution provision unit (100), and a control unit (200). The backflow prevention mechanism includes a tank (91) provided on the water supply path, a water inlet port (92) that is communicated with an upstream water supply path (51) on the water supply path and through which water flows into the tank, a water outlet port (93) through which water in the tank flows out to a downstream water supply path (52), and an overflow port (94) provided to form an air gap between the overflow port and the water inlet port. The solution provision unit supplies acid solution provided by a user to the tank. When having received an instruction to transition to a scale removal mode, the control unit executes scale removal processing of filling the downstream water supply path and the nozzle with the acid solution accumulated in the tank and then discharging the acid solution. The control unit executes water discharge processing of discharging water in the tank before the scale removal processing.