The periodontal cleaning device of the present invention includes a cleaning head having a fluid discharge port for discharging a cleaning liquid and a suction unit for sucking waste liquid), and a cleaning liquid source connected to the fluid discharge port via a fluid supply line Controllable suction means connected to the suction part via a suction line, and controllable fluid supply means for controlling the flow of the cleaning liquid from the cleaning liquid source to the fluid discharge port) To do. The periodontal cleaning device further comprises a control unit, the control unit controls the controllable suction means to generate a vacuum pulse at the suction part, and a cleaning liquid flow pulse at the fluid discharge port in response to the vacuum pulse. Controlling the controllable fluid supply means so as to generate, and controlling the controllable suction means so as to generate the next vacuum pulse at the suction part, generating the cleaning liquid flow pulse at the fluid discharge port and the Control is performed so as to place a pause of a predetermined time interval (t d4 ) between the generation of the next vacuum pulse in the suction unit.本発明の歯周洗浄装置は、洗浄液を放出するための流体放出口及び廃液を吸引するための吸引部）を有する洗浄ヘッドと、流体供給ラインを介して前記流体放出口に接続される洗浄液源と、吸引ラインを介して前記吸引部に接続される制御可能な吸引手段と、前記洗浄液源から前記流体放出口への洗浄液の流れを制御するための制御可能な流体供給手段）と、を具備する。歯周洗浄装置はさらに、制御ユニットを具備し、制御ユニットは前記吸引部で真空パルスを発生させるよう前記制御可能な吸引手段を制御し、前記真空パルスに応じて前記流体放出口で洗浄液流パルスを発生させるよう前記制御可能な流体供給手段を制御し、前記吸引部で次の真空パルスを発生させるよう前記制御可能な吸引手段を制御し、前記流体放出口での洗浄液流パルスの発生と前記吸引部での前記次の真空パルスの発生との間に予め決められた時間間隔（ｔｄ４）のポーズを置くように制御する。
