Production of poultry meat organized on industrial principles, i.e. in intensive way, is characterized by housing of broilers in closed buildings, often in very high housing densities with completely controlled conditions of environment and nutrition. Objective of the research was to investigate the possibility for improvement of certain slaughter traits of broiler chickens using lower housing density of 12 birds/m2 of box floor area in comparison to control group which was housed in density of 16 birds/m2. Body masses of broilers of both sexes prior to slaughtering were higher in trial group (p<0,01) 2460,91 g for male broilers, and 2063,33 g for female broilers compared to control group (2078,67 g males and 1740,0 g females). As a consequence of greater body masses prior to slaughtering in broilers of trial group also highly significantly greater (p<0,01) masses of processed carcasses were determined. Differences in relative indicators of yield of processed carcasses between investigated groups were not significant. Shared of major carcass part in broilers of both sexes were slightly higher (p>0,05) in trial group compared to control. On carcasses of investigated males in lower housing density the share of breasts was increased the most, and on female carcasses the share of drumsticks.