A transdermal administration device includes: a substrate having a first surface and a second surface opposite to the first surface； a plurality of projections protruding from the first surface of the substrate, the plurality of projections being provided for piercing an administration target； and a raised and/or recessed structure composed of a plurality of raised and/or recessed elements. The plurality of raised and/or recessed elements includes at least either of raised elements raised from the second surface or recessed elements recessed from the second surface. The substrate, the projections and the raised and/or recessed structure are made of transparent material, and the plurality of raised and/or recessed elements forms a pattern as viewed in a direction perpendicular to the second surface which is finer than a pattern formed by the plurality of projections as viewed in a direction perpendicular to the first surface.
