PURPOSE: To obtain a laminated plate of low thermal expansion and migration resistance improved by using glass cloth from glass fibers of low thermal expansion as a base material.

CONSTITUTION: When a laminated plate is produced by impregnating glass cloth as a base material with a thermosetting resin, drying them and hot- pressing the resultant prepreg, the glass cloth constituted with glass fibers of less than 4ppm/°C thermal expansion coefficient is used as the base material. The glass cloth is preliminarily treated with more than 0.15wt.%, preferably more than 0.2wt.% of surface-treating agent. The epoxy resin containing a phenolic resin as a curing agent is combined with an amine silane surface- treating agent. The epoxy resin containing dicyandiamide as a curing agent is combined with a cationic silane surface-treating agent.