This diploma thesis is aimed at the evalution of measured dimensions of dust particles from selected wood types by laser dimensional analysis method. Samples of the used dust particles were prepared with sandpaper grinders - grain size 80 to 120. Evaluated were the dust particles from several samples of softwood, hardwood, composites and exotic wood. Norway spruce (Picea abies), European beech (Fagus sylvatica), Aspen Poplar (Populus tremula), composites, Zebrano (Microberlinia brazzavillensis), Iroko (Milicia excelsa, Milicia regia), Bubinga (Guibourtia arnoldiana), Ipe (Tabebuja spp), Wenge (Millettia laurentii) and Red Meranti (Shorea acuminata). The size of. dust particles was established experimantaly by standard operating procedures using Mastersizer 2000 laser analyser. Subsequently the representation of particles in size intervals up to 500 μm was evaluated. By evaluating selected samples we came to the result that the highest % representation was in the intervals from 34.674 μm to 120, 226 μm. Wenge was shown to possess the % highest proportion of dust particles in the lowest intervals 79,433 μm do 91,201 μm Particles with lower dimensions are more reactive and pose a higher risk of creating explosive atmosphere.