PROBLEM TO BE SOLVED: To provide a liquid feed pump capable of preventing an occurrence of incorrect administration caused by signal noise and aged deterioration in respective parts of the syringe pump.SOLUTION: When it is determined that a difference between an arithmetic result calculated by a first operation part 108 and an arithmetic result calculated by a second operation part 109 is less than a prescribed value (NO in step S103), a syringe pump 1 continues liquid feed operation at a dose based on the arithmetic result calculated by the first operation part 108, however, when it is determined that a difference between the arithmetic result calculated by the first operation part and the arithmetic result calculated by the second operation part is more than the prescribed value (YES in step S103), executes prescribed corresponding processing.SELECTED DRAWING: Figure 6
