| abstract |
【Task】 The present invention provides a microneedle array that has microneedles that can be easily inserted into the skin surface layer and / or skin stratum corneum and dissolves and disappears in the skin surface layer and / or skin stratum corneum after insertion. A microneedle array in which fine needle-shaped microneedles are formed on the surface of a substrate, wherein the microneedles have a weight average molecular weight of 400,000 or more and a high molecular weight hyaluronic acid of 60 to 90% by weight and a weight average. A microneedle array comprising 40 to 10% by weight of a low molecular weight polymer substance having a molecular weight of 50,000 or less. [Selection] Figure 2 |