Biogas one of the renewable energy that can be used as an alternative to reduce the use of fossil energy, raw materials of biogas energy is garbage and organic waste overflow crowds around us, the rest of the vegetable from market, animal dung and human waste, are some examples of junk and organic waste which can be used as raw material for biogas. This study, the biogas produced from organic waste materials and used addition of bacterial starter, the EM4 purchased from the farm shop. The study was conducted to compare the calorific value of the biogas produced by the variation of the addition of EM4 stater. Variations addition of EM4 done on the variation of 25ml, 50 ml and 75 ml per 400ml of organic waste materials that have been mixed with water at a ratio of 2: 1. Calorific value generated is the variation of 876.21 J / liter, 863.01 J / liter, 75ml of 1131.31 J / liter respectifly.