The subject of the present invention is to provide a microneedle array device capable of sufficiently dissolving the needle. According to the present invention, there is provided a microneedle array device including: a microneedle array having a sheet portion and a plurality of needle portions existing on the upper surface of the sheet portion, and a pressing member that presses the sheet portion The surface on the opposite side to the surface having the needle portion, wherein the thickness of the sheet portion is 0.1 to 0.6 mm, and the area A of the pressing surface of the pressing member that presses the sheet portion of the microneedle array and the microneedle array The area B of the area where the needle part exists satisfies 0.3≤A/B≤0.75.本發明的課題為提供一種能夠充分溶解針部之微針陣列裝置。依本發明，提供有一種微針陣列裝置，其具備：微針陣列，其具有片材部和存在於片材部的上表面之複數個針部、及按壓構件，其按壓上述片材部的與具有針部的面相反的一側的面，其中上述片材部的厚度為0.1～0.6mm，按壓上述微針陣列的片材部之上述按壓構件的按壓面的面積A與上述微針陣列的存在針部之區域的面積B滿足0.3≤A/B≤0.75。
