PROBLEM TO BE SOLVED: To provide an IABP driving device which can appropriately determine the propriety of a balloon drive timing from waveform display of a display part even in a state that only one of a blood pressure signal and an electrocardiogram signal is input in the IABP driving device, and in which it is easy to adjust the timing by a manual operation when the drive timing is not appropriate.SOLUTION: An IABP driving device includes a display part 54 that can display an inner pressure waveform 54ba indicating an inner pressure of a balloon, a blood pressure waveform 54bb indicating a blood pressure of a patient, and an electrocardiogram waveform 54bc indicating an electric activity of the heart of the patient together, and a display control part for controlling the display state of the display part. The display control part is configured so that the display state of the display part can be switched between a first state 92 in which the blood pressure waveform is displayed close to the inner pressure waveform as compared with the electrocardiogram waveform and a second state 94 in which the electrocardiogram waveform is displayed close to the inner pressure waveform as compared with the inner pressure waveform.SELECTED DRAWING: Figure 5
