The purpose of the present invention is to provide a hydrophilic resin composition having excellent UV curing properties and UV shielding performance, a hydrogel comprising the composition, and a molded article thereof. A photocurable composition containing: (A) a monomer having one (meth)acryloyl structure； (B) a crosslinking agent having at least two acryloyl structures, and included in an amount of 0.1-10 wt% relative to the total of component (A) and component (B)； (C) an inorganic UV shielding agent with 1-50 nm as the 50% cumulative particle size in a volume-weighted particle size distribution obtained by dynamic light scattering, and included in an amount of 0.5-10 parts by weight per a total 100 parts by weight of component (A) and component (B)； and (D) a photoinitiator included in an amount of 0.05 to 1 part by weight per a total 100 parts by weight of component (A) and component (B), wherein all or a portion of component (A) is a hydrophilic monomer, and the content of the hydrophilic monomer is at least 70 wt% relative to the total weight of component (A) and component (B).本發明的目的在於提供一種具有優異的紫外線硬化特性及紫外線遮蔽能力的親水性樹脂組成物、以及包含該組成物的水凝膠及其成型品。本發明為一種光硬化型組成物，其包含： （A）具有一個(甲基)丙烯醯基結構的單體； （B）具有兩個以上的(甲基)丙烯醯基結構的交聯劑：相對於（A）成分與（B）成分的合計而為0.1重量%～10重量%； （C）於利用動態光散射法所得的體積基準的粒度分佈中具有1 nm～50 nm的50%累積粒徑的無機紫外線遮蔽劑：相對於（A）成分與（B）成分的合計100重量份而為0.5重量份～10重量份；以及 （D）光聚合起始劑：相對於（A）成分與（B）成分的合計100重量份而為0.05重量份～1重量份，且 所述（A）成分的一部分或全部為親水性單體，相對於所述（A）成分與所述（B）成分的合計重量，該親水性單體的含量為70重量%以上。
