Administration Device

Abstract: Provided is an administration device having a novel structure that enables anyone to uniformly jet and stably administer a substance to be administered such as a powdery drug. This device is a single-use type administration device 10 for administering a preset amount of a substance to be administered, such as a powdery drug, into the nasal cavity, etc. The administration device 10 is equipped with: a pump member 20 which has a squeezed shape as a whole and deforms when pressed to reduce the internal volume thereof; and a cylindrical guide member 30 which is positioned inside the pump member 20 and guides the deformed part of the pump member 20. The pump member 20 is in a shape having a tapered large-diameter part 21 and a tapered small-diameter part 22 which has a smaller diameter than the large-diameter part 21. Between the large-diameter part 21 and the small-diameter part 22, a step 23, wherein the degree of squeezing changes in the course of the squeezed shape, may be formed.

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