A microneedle array for subcutaneous insertion, comprising: a substrate ; a plurality of needle openings provided in the substrate ; and a plurality of needle units disposed around respective needle openings and each having a plurality of microneedles circumferentially arranged at regular intervals around a respective needle opening to protrude from the substrate so as to be inserted into the skin, wherein the substrate and the microneedles are formed of a bioabsorbable metal, wherein the bioabsorbable metal includes at least one element of magnesium and zinc generating hydrogen gas and MgCl, or hydrogen gas and ZnO in a reaction with water, in a decomposition process when inserted into the skin, wherein the microneedle includes a first needle section having a first end connected to the substrate , and a second needle section having a first end connected to a second end of the first needle section , with the first and second needle sections protruding in vertical directions from a surface of the substrate , wherein the first needle section has a gradually narrower width from the first end to the second end thereof in a longitudinal direction, characterized in that the microneedle includes a carrying recess having a first end partially disposed in the substrate and a second end disposed to extend toward a distal end of the microneedle in a longitudinal direction thereof and a carrying hole being provided in the carrying recess , wherein a cutout portion is provided at a connection between the first needle section and the substrate , the cutout portion being formed by cutout slits respectively disposed between the opposite widthwise ends of the first needle section and the first end of the carrying hole at the first end of the first needle section . a substrate ; a plurality of needle openings provided in the substrate ; and a plurality of needle units disposed around respective needle openings and each having a plurality of microneedles circumferentially arranged at regular intervals around a respective needle opening to protrude from the substrate so as to be inserted into the skin, wherein the substrate and the microneedles are formed of a bioabsorbable metal, wherein the bioabsorbable metal includes at least one element of magnesium and zinc generating hydrogen gas and MgCl, or hydrogen gas and ZnO in a reaction with water, in a decomposition process when inserted into the skin, wherein the microneedle includes a first needle section having a first end connected to the substrate , and a second needle section having a first end connected to a second end of the first needle section , with the first and second needle sections protruding in vertical directions from a surface of the substrate , wherein the first needle section has a gradually narrower width from the first end to the second end thereof in a longitudinal direction, characterized in that the microneedle includes a carrying recess having a first end partially disposed in the substrate and a second end disposed to extend toward a distal end of the microneedle in a longitudinal direction thereof and a carrying hole being provided in the carrying recess , wherein a cutout portion is provided at a connection between the first needle section and the substrate , the cutout portion being formed by cutout slits respectively disposed between the opposite widthwise ends of the first needle section and the first end of the carrying hole at the first end of the first needle section . <EOS>