[Object] The present invention provides a filtering apparatus, a sprinkling apparatus using the filtering apparatus, and a filtering method by which a state where filtering sections are not clogged can be maintained by filtering out foreign matter such as water scale during continuous water feeding and cleaning and discharging the filtered-out foreign matter at each timing of restart of water feeding, and weakening and unexpected stoppage of water jetting due to foreign matter clogging the filtering sections can be prevented. [Solution Means] A filtering apparatus A includes a liquid passage chamber 1 including a control panel 11 provided with a liquid lead-in port 10 into which a flowing liquid flows, and liquid passage holes 110 and 111, and an initial moving plug body 12 that closes the liquid passage hole 110, 111, a drainage chamber 2 provided to be continuous with the liquid passage chamber 1 and including compartment chambers 20 and 21 provided corresponding to the liquid passage holes 110 and 111,
