The copolymer hydride of the present invention is a hydride of a copolymer containing aromatic vinyl monomer units and chain conjugated diene monomer units. Among the at least two peaks derived from the copolymer hydride in the leaching curve measured by gel permeation chromatography of the sample containing the hydride of the copolymer, it shows the fastest leaching time When the peak derived from the copolymer hydride is defined as the first peak, and the peak derived from the copolymer hydride with the second fastest leaching time is designated as the second peak, "based on the lysis time of the first peak The ratio of the molecular weight (molecular weight of the first peak) "to the" molecular weight based on the elution time of the second peak (molecular weight of the second peak) "is 1.50 or more. In addition, the second peak molecular weight is 1,000 or more.本發明之共聚物氫化物係包含芳族乙烯單體單元與鏈狀共軛二烯單體單元的共聚物之氫化物。在將含有共聚物之氫化物之試樣之以凝膠滲透層析法量測到的溶析曲線所具有之至少2個源自共聚物氫化物之尖峰中，表現出溶析時間最快之頂峰的源自共聚物氫化物之尖峰定為第1尖峰，將溶析時間第2快之頂峰的源自共聚物氫化物之尖峰定為第2尖峰時，「依據第1尖峰之溶析時間的分子量（第1尖峰分子量）」相對於「依據前述第2尖峰之溶析時間的分子量（第2尖峰分子量）」的比為1.50以上。並且，第2尖峰分子量為1000以上。
