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. [3] investigated on the discharge behaviors of Li/S batteries with various polymers at different temperatures. Chu et al. [4] reported the cycling properties of Li/S cell with PEO, PVdF and liquid electrolyte. Kim et al. [5] attempt to correlate the electrochemical behavior of the lithium sulfur battery with the physical characteristics of electrolyte. Shin et al [6] 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?