A UV curable organopolysiloxane composition includes: (A) a linear or branched organopolysiloxane having the following formula (1): wherein R1 and R2 independently represent a monovalent hydrocarbon group, “a” is an integer of 1 to 3, and a chain line indicates a bond; (B) a linear or branched organopolysiloxane represented by the following formula (2): wherein R3 and R4 independently represent a monovalent hydrocarbon group, “a” is as defined above, and a chain line indicates a bond; and (C) a photoinitiator.