PROBLEM TO BE SOLVED: To provide a high-quality microneedle device having a fluid conduit (through-hole), which can puncture a skin with small power without pain, and can smoothly perform the infusion of a drug or the suction of blood, a body fluid, etc. after the puncture.SOLUTION: The microneedle device 10 is a structure in which a plurality of needle-shaped projections 12 are formed on a flat base plate 11 so as to be integrated with the flat base plate 11 and aligned, wherein a distal end 17 side of the needle shape projection 12 from the boundary surface 13 is composed of a first material 14a that shows solubility in a body, and a flat base plate 11 side thereof is composed of a second material 14b that is insoluble, and has the fluid conduit 15 that is formed in the needle-shaped projections 12 and penetrates only a bottom surface side of the flat base plate 11.COPYRIGHT: (C)2013,JPO&INPIT【課題】流体管路(貫通孔)を有するマイクロニードルデバイスにおいて、皮膚に対して小さい力で痛み無く穿刺可能で、かつ穿刺後は薬剤注入または血液、体液等の吸引を円滑に行うことが可能な高品質のマイクロニードルデバイスを提供する。【解決手段】平坦な基板11に複数の針状突起物12が基板11と一体的に整列した状態で形成された構造体であり、針状突起物12は境界面13を境に先端部17側が体内で可溶性を示す第1の材料14aで構成され、基板11側が不溶性の第2の材料14bで構成され、針状突起物12の内部に基板11の底面側にのみ貫通した流体管路15を有するマイクロニードルデバイス10。【選択図】図1
