The purpose of this study was to study the factors that influenced the behaviour of prenatal care. Its conducted to 180 samples of pregnan cies. There were 3 stages of sampling regent (kabupaten), district (kecamatan)/Health Centre and village. All pregnancies in selected villages were samples (cluster). The data collection was conducted using interview guide and analized using multiple linier regression. The results were: that variable with strongest influence to the prenatal care behaviour was level of pregnancy care knowledge. Other variables were accesibility to health fasilities and health education participation.