PROBLEM TO BE SOLVED: To provide an insulin pump by which a user (a patient) can obtain sufficient drug efficacy by giving an adequate amount of liquid medicine into an organism.SOLUTION: An insulin pump 100 comprises: an injection part (an injection disposable part 110) a liquid feeding part 120 (a liquid feeding disposable part 120A and a liquid feeding reuse part 120B) an instruction part (a controller 130) a detection part 140 and a control part 150. The control part permits a filling operation of insulin S by a liquid feeder (a liquid feeder 122) when a detection is made that the controller and a holding member (a cradle 112) are both within a predetermined range.SELECTED DRAWING: Figure 2COPYRIGHT: (C)2016,JPO&INPIT