The purposes of this study were to evaluate the levels of sleep quality and to examine its related factors in the elderly Korean adults. A cross-sectional research design was used, and 157 adults, aged from 65 to 89, were recruited from five community health centres in Gyeonggi province and Seoul, Korea. All participants were informed about the purpose of the study and were asked to provide demographic characteristics, chronic conditions, self-rated health, pain, depression, life satisfaction and sleep quality. More than 60% of the participants reported having poor sleep quality. Hierarchical multiple regression analysis showed that age, self-rated health, pain and depression were related to poor sleep quality. The findings suggest that it is important to screen regularly for sleep quality, and attention to depression, poor self-rated health and perceived pain were needed to improve sleep quality of older adults.