Provided is an administration apparatus for administering a dosing liquid. The administration apparatus includes a storage unit storing the dosing liquid, a drive unit imparting administration energy and a pressurization unit pressurizing the stored dosing liquid with the administration energy. The administration apparatus also includes an injection unit injecting the pressurized liquid to an object region through an injection port. In a pressure transition of the dosing liquid at the injection port, a vibration in the pressure transition reaches a converged state from a rising time of pressure. Furthermore, a ratio of a peak value of an initial vibration element to a peak value of subsequent vibration elements other than the first vibration element is higher than 1 and equal to or lower than a prescribed first ratio. As a result, invasiveness to the object region during administration is reduced.
