The diploma thesis deals with production of glue mixtures for plywood and possible substitutes of technical flour as filler by other material with comparable properties. The aim of the work was to obtain a suitable fraction from the spruce bark and subsequent formation of adhesive mixtures with different percentage of spruce bark as filler. From the blends prepared, plywood was molded and tested for mechanical and physical properties such as flexural modulus and flexural strength, tensile strength perpendicular to the plane of the plate, swelling and absorbency. At the end of the thesis there is a graphical and verbal evaluation of the recorded results.