Provided is an injection apparatus which injects a dosing liquid containing a prescribed substance to an object region. The injection apparatus includes a storage unit storing the injection liquid, a drive unit imparting injection energy and a pressurization unit pressurizing the stored injection liquid with the injection energy. The injection apparatus also includes an injection unit injecting the pressurized injection liquid to the object region through an injection port. In a pressure transition of the injection liquid at the injection port, a vibration in the pressure transition reaches a converged state within a prescribed period of time from a rising time of pressure, and pressure reaches a peak value thereof at a prescribed rate of increase. Alternatively, the vibration in the prescribed period of time is a vibration at a frequency belonging to a prescribed frequency range. As a result, invasiveness to the object region during injection is reduced.
