Abstract: An ultraviolet-curable silicone composition comprising(A) 100 parts by weight of an epoxy-functional polyorganosiloxane which comprises structural units represented by the formula R.sup.1 R.sup.2 SiO, wherein R.sup.1 represents hydrogen atom or a monovalent hydrocarbon group and R.sup.2 represents hydrogen atom, a monovalent hydrocarbon group, or a monovalent epoxy-functional organic group, and in which at least two of all the organic groups are a monovalent epoxy-functional organic group;(B) from 1 to 80 parts by weight of at least one copolymer for regulating peel strength, which is soluble in component (A), selected from the group consisting of (i) a copolymer represented by a unit structure of MQ or M.sup.A Q, (ii) a copolymer represented by a unit structure of M.sup.A T, MT.sup.A or M.sup.A T.sup.A, and (iii) a copolymer represented by a unit structure of M.sup.A DQ, MD.sup.A Q or M.sup.A D.sup.A Q, wherein M represents an R.sup.3.sub.3 SiO.sub.1/2 unit, M.sup.A represents an R.sup.3.sub.2 R.sup.4 SiO.