An array 1 provided with microprotrusions comprises a base 2 and tapered microprotrusions 3 each disposed on the base 2 and tapering down toward the tip from the bottom. Letting a distance from the tip to the bottom on an arbitrary side of each microprotrusion 3 as a and letting the length of a second line segment prepared by projecting a first line segment representing the distance a onto the base 2 as b, a relationship of 1.0 < (a/b) ‰¤ 7.5 holds.本發明之附微小突起之陣列(1)係具備:基板(2)、設於其基板(2)且從底部朝前端部變細之錐狀的微小突起(3)。設微小突起(3)的任意側面中之前端部至底部之距離為a,且設顯示該距離a之第1線段投影於基板(2)上而成之第2線段的長度為b時,成立1.0<(a/b)≦7.5之關係。1...附微小突起之陣列2...基板3...微小突起4...貫通孔
