Sleep is one of the physiologic necessities of human life, the postpartum mother could experience changing of sleep pattern and loss of sleep duration in the evening. Factors that cause irregular sleep pattern and sleep deprivation of role adaptation and baby characteristic. This study aims to identify the correlation between Infant temperament and sleep quality of postpartum mother. This study was designed to cross-sectional with 168 respondents, the samples’ inclusion criteria was 4-6 weeks postpartum mother, non-coffee consumer, non-alcoholic mother, did not smoke actively, healthy, literate, and mother of healthy baby/infant, who taken by consecutive sampling in work area of primary health care in Prambanan and Jogonalan, Klaten, Central Java, Indonesia. The instrument of this study was using Infant Characteristic Questionnaire (ICQ) and Pittsburg Sleep Quality Index (PSQI). Chi square test was used to analyze the data. The resulting study showed that the respondents have the average age of 27 years and had a vaginal delivery (79,8%). The respondents show that dominant had poor sleep quality (83,3%) and have a baby with non-difficult temperament (69,6%). The infant temperament and sleep quality postpartum mother were significantly correlation (p=0,007). Education of infant temperament should share in a prenatal mother. Further research can examine the effect of education on infant temperament for a mother to sleep quality of postpartum mother.