Latar Belakang : Tantangan yang signifikan pada pemberian ASI Eksklusif ada pada tahap bayi baru lahir. Di Indonesia tahun 2023, hanya 27% bayi baru lahir yang menerima ASI pada jam pertama kelahiran. Keberhasilan menyusui memerlukan kesabaran, waktu, sedikit pengetahuan tentang menyusui dan dukungan dari lingkungan terutama suami (breastfeeding father). Sikap dan pengetahuan merupakan faktor predisposisi yang mempengaruhi penerapan breastfeeding father. Tujuan : Penelitian ini bertujuan untuk mengetahui adanya hubungan pengetahuan suami dan sikap breastfeeding father terhadap keberhasilan menyusui dini di UPTD. Rumah Sakit Umum Negara. Metode: Penelitian ini menggunakan desain analitik korelasi dengan menggunakan pendekatan cross-sectional dan metode pengambilan sampel purposive sample. Sampel sejumlah 106 suami yang memiliki bayi usia 0-3 hari di UPTD. Rumah Sakit Umum Negara pada bulan Maret – April tahun 2025. Jenis pengambilan data primer dengan menggunakan kuesioner kemudian dianalisa menggunakan uji fisher exact test dengan signifikansi 0,05. Hasil : dari 106 responden didapatkan bahwa tingkat pengetahuan suami memiliki hubungan signifikan dengan keberhasilan menyusui dini (p=0,000). Sedangkan sikap breastfeeding father tidak memiliki hubungan yang signifikan dengan keberhasilan menyusui dini (p=0,170) Kesimpulan : Keberhasilan menyusui dini signifikan dipengaruhi oleh tingkat pengetahuan suami. Sementara sikap breastfeeding father tidak mmpengaruhi secara signifikan keberhasilan menyusui dini. Kata kunci : Asi Eksklusif, Pengetahuan suami, Sikap Breastfeeding Father, Keberhasilan Menyusui Dini

Background. A significant challenge to exclusive breastfeeding lies in the newborn stage. In Indonesia in 2023, only 27% of newborns received breast milk within the first hour of birth. Successful breastfeeding requires patience, time, some knowledge about breastfeeding, and support from the environment, especially the husband (breastfeeding father). Attitude and knowledge are predisposing factors that influence the implementation of breastfeeding fathers. Aim. To determine the correlation between husbands' knowledge and the attitude of breastfeeding fathers towards early breastfeeding success at Negara General Hospital. Method. This study employed correlational analytic design with cross-sectional approach. There were 106 husbands with infants aged 0-3 days recruited as the sample through purposive sampling technique. The study was conducted in March-April 2025 at the Negara General Hospital. The primary data was collected using questionnaire and analysed by using the Fisher exact test with significance level of 0.05. Finding. The finding showed that husbands' knowledge level had a significant correlation with early breastfeeding success (p=0.000). Meanwhile, the attitudes of breastfeeding fathers were not significantly associated with early breastfeeding success (p=0.170). Conclusion. In conclusion, early breastfeeding success was significantly influenced by the husband's knowledge level. Meanwhile, attitude of breastfeeding fathers did not significantly influence early breastfeeding success. Keywords: Exclusive Breastfeeding, Husband's Knowledge, Attitudes of Breastfeeding Father, Early Breastfeeding Success