Anaerobic Baffled Reactor (ABR) is an improved septic tank where addition of filler materials may increaseits efficiency significantly. This study is based on the criteria and performance of Anaerobic Baffled Reactor (ABR) when modified with four different kinds of filler materials as filter medium. Sand, Coconut shell, Stone chips and Brick khoawere used as filler material through which kitchen waste water was passed. Water quality was measured before and after filtration of kitchen waste water through selected filler materials. The assessment of water quality after filtrating through filler materials makes significant changes to find out best suit filler materials as filtering medium. This study reveals that double layer sand filler is the best suit for removal of pathogens, BOD and COD and it can be used as irrigation and gardening purposes and furthur treatment is mendatory to make it drinkable. With respect to the BOD removal coconut shell possesses better result whereas sand filer is better for COD removal. Coconut shell removed 43% BOD and sand removed about 65% COD. Brick khoa shows better result for color, hardness and CO2 removal and removed 76%, 87% and 82% respectively.