Attention to the issue of quality of life or subjective well-being is increased among the psychologists. However most researches are with adults, this study was performed to develop the Korean Life Satisfaction Scale for Adolescence and examined the relationship the negative event to the life satisfaction. The MSLSS was administered to a sample of 420 first grade boys (mean age: 13.4) in junor high school(Y school and B school). The final version of the scale (KLSSA) demonstrated a 5-factor solution and acceptable internal consistency for the total and subscale scores. Futhermore the KLSSA subscales correlated with the criterion measure (the subscales of SIQYA). The negative life events correlated not with the life satisfaction but with the depression. Especially the life satisfaction of the subjects with negative event (death of friend due to gas explosion) was not different significantly from the others. These results and suggestions for further research were discussed.