S ludge is product from wastewater treatment, that can not be abandoned but it should be treated. Sludge has characteristics that make such a simple solution unlikely, they are potentially harmful and they have too much water. The second caracteristic cause a large amount of sludge volume, so they need a large disposal area. One of the solutions is to reduce sludge volume by decreasing moisture content in sludge . The aim of this research is to identify the effect of polyelectrolytes to specific resistance of chrom and nickel sludge. Buhner funnel test is used to identify sludge specific resistance. Specific resistance is defined as resistances to fluid flow exerted by cake of unit weight dry solid per unit area. Anionic, kationic and non ionicpolyelectrolytes are used to reduce sludge specific resistance. The conclusion of research is that polyelectrolytes can be used to reduce sludge specific resistance. The conlution of the research is that polyeletrolytes can be used to reduce specific resistance of chrom and nickel sludges. The mopst effctive polyelctrolyte in reducing specific resistance is non ionic polyelectrolyte. The optimum dosage pH of each polyelectrolytes can be resumed as folows :Anionic and nonionic polyelectrolytes are effective at high pH level, that is 12 kationik polyelectrolyte is non effective in reducing specific resistance of chrom and nickel sludge at high pH level. The specific resistance is increasing at high dosage of polyelectrolytes. Specifik resistance must be decrease to increase filter yield. The high value of filter yield result higher sludge density, so the sludge volume will be decrease. The hifghes filter yield can be achived using 90 mg/L dosage of non ionic polyelectrolyte at pH 12. Finally, reducing of sludge volume will reduce the cost of transportation of sludge and electricity in mechanical dewatering.