A particle filtering device, according to one embodiment of the present invention, having a rotating circular or polygonal lab-on-a-disc shape comprises: a filtering membrane for filtering a sample to isolate particles; a main chamber which is connected to an input-side surface of the filtering membrane and which supplies the sample to the input-side surface of the filtering membrane; an output-side chamber which is connected to an output-side surface of the filtering membrane and which accommodates filtered liquid from which the particles have been isolated through the filtering membrane; and a waste liquid chamber which is connected to the output-side chamber and which stores the filtered liquid, and comprises: a first flow path for connecting the output-side chamber and the waste liquid chamber; and a second flow path which connects the output-side chamber and the waste liquid chamber and which is positioned farther from the center of a lab-on-a-disc than the first flow path.