The present invention provides: a heat- and light-curable coating composition which is suitable as a top clear coat for plastic molded articles for automobiles or household electric appliances or for plastic molded articles having a water pressure transfer print layer; a coating film formation method using the coating composition; and a water pressure transfer method using the coating composition. The heat- and light-curable coating composition comprises: an acrylic polyol resin (a) having a glass transition temperature (Tg) of 50° C. to 100° C., a mass average molecular weight of 1,000 to 20,000, and a hydroxyl value of 20 to 200 mgKOH/g; a multifunctional photocurable compound (b); a polymerization initiator (c); and a polyisocyanate compound (d), wherein a ratio of the acrylic polyol resin to the multifunctional photocurable compound is 5/95 to 90/10, and an equivalence ratio of hydroxyl groups contained in the acrylic polyol resin to isocyanate groups contained in the polyisocyanate compound, (OH/NCO), is 0.5 to 1.5.