γ,δ-Unsaturated carbonyl compounds are well known as products of Clasien rearrangement reaction. These compounds allow further possible transformations due to the presence of a double bond. Therefore, many methods have been developed for their synthesis. The photochemical reactions of organic compounds provide a concise way to form complex molecular skeletons. Herein, we report highly regioselective synthetic method for γ,δ-unsaturated carbonyl compunds using visible light photoredox catalysis (Figure 1).