One of the causes of fermented cocoa beans in the storey box for three days has high fungi level (6:44%) is the cocoa bean fermentation process is not perfect. The cocoa bean fermentation process takes place in two stages. At the beginning of fermentation, fermented cocoa beans within 0-48 hours, after that further fermentation within 48-120 hours. In further fermentation take place aerobic and anaerobic processes. The success of the fermentation process at this stage is highly dependent on air circulation smoothly. The large enough capacity (60 kg) with a total number of aeration holes 45 can not produce a smooth aeration. So the fermentation for three days still produces high fungi level. Meanwhile, the fermentation for five days had fungi level is lower (3.44%). The fermentation process has run perfectly. However, the aeration in storey box is considered still not smooth, because the fungi level is still quite high.