A curable silicone resin composition is provided. It includes (A) an aromatic ring-containing hydrocarbon compound containing at least 2 silicon-bonded hydrogen atoms, in which the silicon atoms are bonded to the hydrocarbon skeleton; (B) an organopolysiloxane with a branched or three dimensional network structure, and with a viscosity at 25.degree. C. of at least 1,000 mPas, having an average composition formula (1): R.sup.1.sub.xSiO.sub.{(4-x)/2} (1) wherein, R.sup.1 independently represent a substituted or unsubstituted monovalent hydrocarbon group, a substituted or unsubstituted hydrocarbyloxy group, or a hydroxyl group, provided from 0.1 to 80 mol % of all the R.sup.1 groups are alkenyl groups, and x represents a positive number that satisfies 1.ltoreq.x<2; and (C) a hydrosilylation reaction catalyst. The composition yields a cured product that is transparent and displays excellent hardness and flexural strength.