The method of cutting composite plate

PROBLEM TO BE SOLVED: To reliably cut a composite plate while reducing flaws generated at a cut surface of a glass plate included in the composite plate without causing a steep rise in production cost.SOLUTION: A composite plate 1 in which a glass plate 2 is integrally laminated on both sides of a resin plate 3 is cut along a cutting plan line CL. This cutting process includes: a glass plate cutting step of removing the glass plate 2 located on the cutting plan line CL by etching and forming an etching removal part 7 in the glass plate 2; and a resin plate cutting step of cutting the resin plate 3 exposed at the etching removal part 7 using a cutter blade via the etching removal part 7.