Latar Belakang: Masa nifas di perlukan asuhan yang berlangsung secara komprehensif, ada kalanya ibu mengalami perasaan sedih yang berkaitan dengan bayinya, keadaan ini disebut baby blues syndrome. Salah satu faktor penyebab terjadinya baby blues syndrome adalah pernikahan dini yang dilakukan oleh pasangan yang menikah dibawah usia 19 tahun. Penelitian ini bertujuan untuk untuk mengetahui hubungan pernikahan dini terhadap kejadian baby blues syndrome pada ibu usia muda. Metode: Jenis penelitian ini merupakan analitik observasional dengan pendekatan cross-sectional. Teknik pengambilan sampel dilakukan dengan total sampling sebanyak 45 ibu dengan teknik analisa menggunakan uji Spearman’s Rho. Hasil: Hasil penelitian didapatkan dari 45 responden sebagian besar responden berusia 20-35 tahun sebanyak 21 orang (46,7%), pendidikan SMA sebanyak 25 orang (55,6%), tidak bekerja sebanyak 29 orang (64,4%), ≤ UMR sebanyak 40 orang (88,9%), primipara/ melahirkan 1 kali sebanyak 27 orang (60%), menikah pada usia ≤ 20 tahun sebanyak 33 orang (73,3%), mengalami kejadian baby blues syndrome sebanyak 31 orang (68,9%). Hasil uji statistik menggunakan Spearman Rho dengan nilai p= 0,000 < 0,05 menunjukkan adanya hubungan antara pernikahan dini dengan kejadian baby blues syndrome pada ibu usia muda. Simpulan: Terdapat hubungan antara pernikahan dini dengan kejadian baby blues syndrome pada ibu usia muda di Desa Sidetapa, Kecamatan Banjar, Kabupaten Buleleng. Kata Kunci: Pernikahan dini, baby blues syndrome, ibu usia muda

Background: The postpartum period requires comprehensive care and sometimes mothers are sad related to their baby. This condition is known as baby blues syndrome. One of the factors that contribute to the incidence of baby blues syndrome is early marriage, specifically among couples who marry before the age of 19. This study was aimed to determine the relationship between early marriage and the incidence of baby blues syndrome on young mothers. Method: This research employed an analytical observational study with a cross-sectional approach. The sampling technique was conducted by using total sampling, involving 45 mothers, with the analysis performed Spearman’s Rho test. Findings: The result showed that out of 45 respondents, the majority of the respondents such as 21 respondents (46.7%) were 20-35 years old, 25 respondents (55.6%) had a high school education, 29 respondents (64.4%) were not working, 40 respondents (88.9%) earned ≤ minimum wage, 27 respondents (60%) were primipara (having given birth once), 33 respondents (73.3%) married at the age of ≤ 20 years, and 31 respondents (68.9%) experienced baby blues syndrome. The Spearman’s Rho showed p= 0,000 < 0,05 which indicated a significant relationship between early marriage and the incidence of baby blues syndrome on young mothers. Conclusion: There is correlation between early marriage and the incidence of baby blues syndrome on young mothers at Sidatapa Village, Banjar District, Buleleng Regency. Keywords: Early Marriage, Baby Blues Syndrome, Young Mothers