This ultraviolet curable silicone adhesive composition that contains (A) an organopolysiloxane resin which contains (a) an R13SiO1/2 unit (wherein R1 represents a monovalent hydrocarbon group) and (b) an SiO4/2 unit, and wherein the molar ratio of the unit (a) to the unit (b) is from 0.6:1 to 1.2:1, (B) a linear or branched organopolysiloxane which has a viscosity of more than 50 mPa·s but 500,000 mPa·s or less, while having 1-4 groups represented by formula (1) and/or (2) (wherein R2 represents H or Me, a represents a number of 1-3, and the broken line represents a bonding hand that is bonded with Si) as Si-bonded groups, and wherein the main chain is composed of repeated diorganosiloxane units, and (C) a reactive diluent which is composed of an organo(poly)siloxane that has a viscosity of 1-50 mPa·s, while having one group represented by formula (3) (wherein a is as defined above, and the broken line represents a bonding hand) at an end of the molecular chain or in a molecular side chain as an Si-bonded group, is rapidly cured by means of irradiation of ultraviolet light, and exhibits good adhesion to a sheet-like substrate.