PURPOSE: To obtain a laminated sheet which is excellent both in accuracy in sheet thickness and in surface irregularity without decreasing productivity.

CONSTITUTION: In a manufacturing method of a laminated sheet wherein a prepreg of one sheet or a plurality of sheets of thermosetting resin impregnated base materials and metallic foils arranged on one side or both sides are pressurized, heated to form lamination, a cushioning material for forming the laminated sheet having a resin layer of 0.5-100μm in a thickness indicating fluidity in either temperature range of a glass transition temperature or higher of the resin for the laminated sheet or -50°C or higher in melting point, is arranged between the metallic foil and the most exterior layer metallic plate to form the lamination.