PURPOSE: To effect laminated boards for electrical use excellent in high-frequency characteristics by using a resin-impregnated fluororesin paper having a specific thickness for at least a piece of resin-impregnated base material.

CONSTITUTION: A laminated board for electrical use monolithically prepared from laminates of a predetermined number of resin-impregnated base materials each metal-foiled in the top and bottom uses resin-impregnated fluororesin paper for at least a piece of resin-impregnated base material. The fluororesin paper must be 150-350% in elongation: less than 150% is susceptible to damage in handling, and more than 350% keeps distortion in handling to decrease dimensional stability. It may be possible to use metal foils composed of single, alloyed or composite material of Cu, Al, Ni, Zn, Fe, etc., and to provide an adhesive layer on a single surface of each metal foil so as to improve adhesiveness as necessary.