PROBLEM TO BE SOLVED: To provide a water-jetting type water purifying apparatus which can be driven even in a pond with a shallow water depth without being affected with sludge in the bottom of the pond. SOLUTION: This water purifying apparatus comprises a bottom having container 10 having water intake part 12 in which a filter member 13 is installed, a float body 20 fixed in the container 10, an underwater pump 30 installed in the container, a water-jetting nozzle 40 fixed in the float body 20, a nozzle 50 for removing refuse, a valve 60, a water level detecting means 70, and a control box 80.
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