Latar belakang. Kejadian stunting masih menjadi masalah kesehatan gizi pada anak yang mendapatkan perhatian khusus di Indonesia. Salah satu faktor yang mempengaruhi kejadian stunting ialah tingkat pengetahuan orang tua. Pengetahuan mengenai pemberian ASI selama enam bulan awal kehidupan berperan sebagai upaya pencegahan stunting. Tujuan. Untuk menganalisis hubungan antara pengetahuan dengan perilaku ibu dalam pemberian ASI Eksklusif untuk pencegahan stunting di Puskesmas I Denpasar Selatan. Metode. Desain penelitian ini menggunakan analitik korelasi dengan pendekatan cross-sectional study. Penelitian dilakukan di Puskesmas I Denpasar Selatan selama 1 bulan. Total sampel sebanyak 154 responden dengan menggunakan teknik consecutive sampling. Instrumen penelitian ini menggunakan kuesioner pengetahuan dan perilaku ibu dalam pemberian ASI Eksklusif untuk pencegahan stunting. Analisa data yang digunakan yaitu analisa univariat dan bivariat. Hasil. Pengetahuan dan perilaku ibu dalam pemberian ASI Eksklusif termasuk dalam kategori baik (100 % dan 79,2%). Hasil analisa yang telah diuji menunjukan tidak terdapat hubungan yang signifikan antara pengetahuan dengan perilaku ibu dalam pemberian ASI Eksklusif untuk pencegahan stunting (p value 0,230 >0,05 , r =0,097). Kesimpulan. Terdapat faktor lain mengenai ibu dalam pemberian ASI Eksklusif untuk pencegahan stunting sehingga seluruh ibu dapat mencari informasi mengenai hal-hal yang berkaitan dengan ASI Eksklusif dan pencegahan stunting khususnya kepada ibu dengan anak usia 0-2 tahun. Kata Kunci : ASI Eksklusif, Pengetahuan ibu, Perilaku ibu, Stunting

Background. Stunting is a nutritional health issue among children that requires specific attention in Indonesian. One of the factors that influence the incidence of stunting is knowledge level of parents. Knowledge about breastfeeding during the first six months of life plays an important role to prevent stunting. Purpose. The correlation between knowledge and behavior of mother in providing exclusive breastfeeding to prevent stunting at Public Health Center I South Denpasar Method. This study employed analytic correlation design with cross-sectional aprroach. This study was conducted at Public Health Center I South Denpasar. There were 154 respondents recruited as sample of the study which were selected using consecutive sampling technique. The data were collected using questionnaire of knowledge and behaviour of mother in providing exclusive breastfeeding to prevent stunting. The data were analyzed using univariate and bivariate analysis. Result. The finding showed that there were 100% of respondents had good knowledge and there were 79.2% of respondents had good behaviour in providing exclusive breastfeeding. The finding indicated that there was no correlation between knowledge and behavior of mother in providing exclusive breastfeeding to prevent stunting with (p value 0.230 >0.05 , r =0.097). Conclusion. In an effort to prevent stunting, there are other factors related to knowledge and behaviour of mother regarding exclusive breastfeeding. It is expected of all mother could seek information regarding the stunting prevention and exclusive breastfeeding, particularly for mothers who’s their children aged 0-2 years. Keywords: exclusive breastfeeding, knowledge of mother, behaviour of mother, stunting.