Introduction : The lithium/sulfur cell was an extremely attractive redox couple because of high theoretical specific energy of 2600Wh/kg(1672mAh/g-sulfur), assuming complete reaction to the Li2S. However, it was very difficult to make a high utilization Li/S cell because of high resistivity and reactivity of sulfur [1,2]. There have been only a few studies of Li/S cell. Cairns et al.  investigated on the discharge behaviors of Li/S batteries with various polymers at different temperatures. Chu et al.  reported the cycling properties of Li/S cell with PEO, PVdF and liquid electrolyte. Kim et al.  attempt to correlate the electrochemical behavior of the lithium sulfur battery with the physical characteristics of electrolyte. Shin et al  investigated on the effect of polymer electrolyte with ceramic filler on the electrochemical properties of Li/S cell. However, there was no study on the self-discharge of the Li/polymer/S cell. In this study, we investigated on the self-discharge of Li/S cell with gel polymer electrolyte at room temperature (25?