Abstract: A device which, in a shallow region including the epidermal layer or the dermal layer, can administer a target even in extremely small amounts. This includes a puncture needle which, in a flat puncture unit for puncturing the shallow region, has a groove and a through-hole which constitute a recess that extends through part of or the entire thickness of the puncture unit; and a casing which houses the puncture needle so as to allow the puncture needle to advance. By part or all of a flow agent containing the drug being arranged in the groove and the through-hole, the drug is positioned with respect to the puncture unit. The device is designed such that a flow agent in the amount of 10-1000 nL is dosed in the shallow region per puncture.