Latar Belakang. Cakupan ANC lengkap merupakan indikator keberhasilan program kesehatan ibu yang menunjukkan kualitas pelayanan, aksesibitas pelayanan kesehatan dan tingkat kepatuhan ibu hamil dalam memeriksakan kehamilannya ke tenaga kesehatan. Pengetahuan ibu tentang ANC berperan penting dalam membentuk perilaku ibu dalam melakukan kunjungan ANC. Tujuan penelitian ini adalah mengetahui hubungan tingkat pengetahuan ibu dengan perilaku kunjungan ANC Lengkap. Metode. Penelitian ini menggunakan desain cross sectional yang dilaksanakan di di UPTD Puskesmas Mengwi II. Populasi penelitian adalah ibu hamil dengan usia kehamilan ≥ 37 minggu, dengan jumlah sampel 115 ibu hamil yang dipilih menggunakan teknik total sampling. Instrumen yang digunakan adalah kuesioner. Analisis data menggunakan analisis univariat dan bivariat dengan uji Korelasi Spearman Rank. Hasil. Penelitian ini menunjukkan bahwa 47,8% responden memiliki tingkat pengetahuan baik tentang ANC, serta 64,3% responden melakukan kunjungan ANC lengkap sesuai rekomendasi. Uji Korelasi Spearman Rank menunjukkan adanya hubungan signifikan antara tingkat pengetahuan tentang ANC dengan perilaku kunjungan ANC lengkap dengan keeratan hubungan kuat dan arah korelasi positif (p

Background: Complete antenatal care (ANC) coverage is an indicator of the success of maternal health programs, reflecting the quality of services, accessibility of healthcare facilities, and compliance of pregnant women in seeking antenatal care. Maternal knowledge about ANC plays an important role in shaping their behavior to attend ANC visits. Purpose: To determine the relationship between maternal knowledge and complete ANC visit behavior. Method: This research employed a cross-sectional design conducted at Public Health Center Mengwi II. The population consisted of pregnant women with gestational age ≥ 37 weeks. There were 115 respondents who were recruited as a sample using the total sampling technique. The research instrument was a questionnaire. Data were analyzed using univariate and bivariate analyses with the Spearman rank correlation test. Result: The findings showed that 47.8% of respondents had good knowledge of ANC, and 64.3% of respondents attended complete ANC visits as recommended. The Spearman rank correlation test indicated a significant correlation between maternal knowledge and complete ANC visit behavior, with a strong positive correlation (p < 0.001; r = 0.545). These findings suggest that the higher the maternal knowledge about ANC, the greater the likelihood of completing ANC visits. Conclusion: It is recommended that health promotion interventions at the community health center provide education about the importance of ANC for pregnant women to increase complete ANC coverage. Keywords: Knowledge, Behavior, Complete ANC, Pregnant Women