Provided is a metal-clad laminated plate, wherein dielectric-thickness tolerance that contributes to characteristic-impedance tolerance is made to be low to deal with the tendency of transmission frequency becoming higher, and wherein transmission loss of signals at high-frequency ranges is small. The metal-clad laminated plate comprises a metal foil on one face or on both faces of a liquid crystal polymer layer, and is characterized in that the metal foil has protrusions formed on the surface layer thereof, by having a face thereof that comes in contact with the liquid crystal polymer layer roughened, and the aspect ratio (H/L) of the protrusions, indicated by the ratio of the height (H) thereof with respect to the width (L) of the base sections thereof, is within a range of 3-20. The metal-clad laminated plate is also characterized in that the height of the protrusions is within a range of 0.1-2 [mu] m, the thickness of the liquid crystal polymer layer is 10-200 [mu] m, and the film-thickness tolerance thereof is less than 6%.