PURPOSE: To reduce services of nurses by reporting the completion of dosing a liquid medicine to a nurse station with wireless in a dripping to a patient.

CONSTITUTION: A medicine liquid is sent to a drip needle 10 at the tip of a tube 9 from the bottom of a bottle 5 holding a medicine 4 for dripping. A drip quantity detection sensor 6 is provided in the course of the tube 9 to detect the presence of a flow of the medicine liquid and the results are sent to a nurse station together with identifying information by a wireless signal. The detection sensor 6 is provided with a light emitting element and a photodetecting element to detect the presence of the medicine liquid passing therebetween. This can lessen burden on a nurse and allows the removing of the drip needle 10 immediately after the completion of dosing a medicine thereby reducing pains of the patient.