Background: Early breastfeeding has a positive impact on both mother and baby. The highest coverage of exclusive breastfeeding in Pesawaran Regency in Puskesmas Gedong Tataan was 97.65%, the lowest achievement was at Puskesmas Kedondong at 14.24% and Puskesmas Kalirejo at 50.00%. In Kalirejo Health Center the exclusive coverage of ASI in 2016 was 69.02% and in 2017 it was 50.00%. Based on the data seen a decrease in exclusive breastfeeding in the area of Kalirejo Health Center.Purpose: To determine the factors associated with exclusive breastfeeding Methods: This type of quantitative research is cross sectional study. The entire population of 94 respondents with a total sample of 77 respondents of mothers who have infants 7-12 months, the research technique sampling is purposive sampling. Data analysis by uni variate and bivariate (ujichi-square).Result:The results of the study are known from 77 respondents obtained results of mothers who are not exclusive breastfeeding as many as 49 (63.6%) respondents. Working mothers were 35 (45.5%) respondents. 54 less knowledgeable mothers (70.1%) respondents. mothers with no nipple abnormalities were 59 (76.6%) respondents. Support of negative health health workers was 29 (37.7%). There is a work relationship with exclusive breastfeeding (p-value = 0,000 and OR10,333). There is a relationship of knowledge with exclusive breastfeeding 000 and OR 15,840). There is a correlation between nipple abnormalities and exclusive breastfeeding . There is a relationship between health personnel support and exclusive breastfeeding 416).Conclusion: Factors related to exclusive breastfeeding are occupation, mother's knowledge, abnormalities of nipple feeding, and support of health workers Suggestion:For this reason, counseling is needed, motivation about the knowledge of breastfeeding to mothers in order to provide exclusive breastfeeding to babies. ABSTRAKLatar Belakang: Menyusui sejak dini mempunyai dampak yang positif baik bagi ibu maupun bayinya. Cakupan ASI eksklusif di Kabupaten Pesawaran tertinggi di Puskesmas Gedong Tataan sebesar 97,65% pencapaian terendah ada di Puskesmas Kedondong sebesar 14,24% dan Puskesmas Kalirejo sebesar 50,00% Pada Puskesmas Kalirejo cakupan ASI eksklusif tahun 2016 sebesar 69,02% dan di tahun 2017 sebesar 50.00%. Berdasarkan data terlihat penurunan pemberian ASI eksklusif di wilayah Puskesmas Kalirejo.Tujuan: Untuk mengetahui factor yang berhubungan denganpemberian ASI Eksklusif Metode: Jenis penelitian kuantitatif pendekatancross sectional study. Seluruh Populasi 94 responden dengan total sampel 77 Responden ibu yang mempunyai bayi 7 -12 bulan, teknik penelitian sampling secara purposive sampling. Analisis data secara uni variat dan bivariate ( ujichi-square ).Hasil penelitian diketahui dari 77 responden didapatkan hasil ibu yang tidak ASI eksklusif sebanyak 49 (63,6%) responden. Ibu yang bekerja sebanyak 35 (45,5%) responden . Ibu yang berpengetahuan kurang sebanyak 54 (70,1%) responden . ibu yang tidak ada kelainan puting susu sebanyak 59 (76,6%) respo...