A drug administration device includes a substrate (11) having a first surface (S1), a projection (12) extending from the first surface (S1 and a solid drug. One direction that intersects with the first surface (S1) is a first direction, and one direction that extends along the first surface (S1) is a second direction. A groove (13) serving as a receiving section is formed in the projection (12). The groove (13) defines a cavity recessed in the first direction toward the substrate (11) and extends in the second direction to open to a section of the peripheral surface (S3) of the projection (12). The drug is received in the groove (13).
