The present invention addresses the problem of providing a novel copolymer having an elastic feeling. A copolymer having a weight-average molecular weight of 20,000-110,000, having one or more types of constituent units (a) derived from a hydrophobic monomer having a specific structure, and one or more types of constituent units (b) derived from a hydrophilic monomer represented by general formula (2) as essential constituent units.本發明的課題在於提供一種具有彈力感之新穎的共聚物。一種共聚物，其係將自具有特定結構之疏水性單體衍生的一種或兩種以上之構成單元(a)與自下述通式(2)所示之親水性單體衍生的一種或兩種以上之構成單元(b)作為必要構成單元具有，且重量平均分子量為20000~110000。
