Health Organization (WHO) urges every mother to give her baby exclusive breastfeeding until the baby is 6 months old. In fact, only 39% of babies under 6 months get exclusive breastfeeding. Many problems arise on the first day of breastfeeding, such as sore nipples, little milk comes out (Hesti, 2013). The research method was carried out using quantitative research methods with a cross sectional approach where the aim was to determine the factors related to breast care in third trimester pregnant women. The population in this study were all pregnant women in the third trimester in Bantarjaya Village as many as 143 people. The sample in this study was third trimester pregnant women in Bantarjaya Village using total sampling technique, the number of samples was 143 people. Data was collected using a questionnaire. Â Data analysis with univariate, bivariate and multivariate. The output produced at this stage is knowing the factors related to breast care in third trimester pregnant women and supporting exclusive breastfeeding in Bantarjaya Village, Pebayuran District, Bekasi Regency. The results showed that there was a relationship between education of pregnant women and breast care for pregnant women with P value = 0.000 and OR = 9.257 (4,135.-20,725). There is a relationship between knowledge of pregnant women and breast care for pregnant women with P = 0.000 and OR = 10.222 (4.721-24.466). There is a relationship between the work of pregnant women and breast care for pregnant women with P = 0.032 and OR = 2.249 (1.104-4.583). There is a relationship between husband's support and breast care for pregnant women with P value = 0.000 and OR = 10.387 (4.566-23.630). The results of the multivariate analysis resulted in the final model equation as follows: Education P value = 0.023 and OR = 4,866 (1,248-18,968), Knowledge P = 0.004 and OR = 7.697 (1,905-31,104), work P = 0.004 and OR = 0.004 (0.022 - 0.485), husband's support value of P = 0.000 and OR = 7.811 (2.682-22.753). Based on these data, it is clear that husband's support is very strong in breast care for pregnant women in the third trimester. There is a need for the role of health workers and the health office to increase the knowledge and motivation of pregnant women in carrying out breast care as early as possible, namely starting during pregnancy, the aim is to prepare for breastfeeding through community empowerment such as cadres, community leaders and religious leaders.