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Objective: To evaluate the sleep quality and its related factors among perimenopausal women. Methods: A self-designed questionnaire was administered to 506 perimenopausal women. The questionnaire included the influencing factors on the sleep quality, the Pittsburgh Sleep Quality Index (PSQI), the Zung Self-Rating Depression Scales (SDS), the Zung Self-Rating Anxiety (SAS) and the Modified Kupperman Index (KI). Data were analyzed by SPSS11.5. Results: The mean PSQI was 5.97±4.30.Twenty-four percent of perimenopausal women reported poor sleep. Age and perimenopausal symptoms were significantly correlated with sleep quality. The sleep quality of the 45～49 age group was the poorest and the 40～44 age group was the best. The women who had higher Kupperman index were more likely to be poor sleepers. There was no significant correlation between occupation and sleep quality. Night sweat, depression, anxiety, hot flash, stressful life event, and regular exercise were significantly and independently related with sleep quality. Among them, regular exercise was a protective factor of sleep quality. Conclusion:High incidence of poor sleep quality exists among perimenopausal women. Some effective interventions should be taken to improve the sleep quality of perimenopausal women.