<![CDATA[Background: Adolescent reproductive health is a major global challenge. Studies have reported around 16 million women 1519 years old give birth each year, 11% of all births worldwide.95% of these births occur in low- and middle income countries. This study aimed to examine factors associated with pre-marital sexual behavior among adolescents in Bima, West Nusa Tenggara, using Theory of Planned Behavior (TPB).Subjects and Method: This was a cross-sectional study conducted in Bima, East Nusa Tenggara, Indonesia, from April to June 2018. A sample of 200 senior high school students was selected by proportional stratified random sampling. The dependent variable was healthy pre-marital sex behavior. The independent variables were intention, attitude, maternal education, subjective norm, peer norm, perceived behaviour control (PBC), and reproduction health information center (PIK-KRR). The data were analyzed by path analysis.Results: Healthy pre-marital sex behavior was directly increased with intention (b= 0.56; SE= 0.03; p<0.001) and PBC (b= 0.07; SE= 0.03; p= 0.025). Healthy pre-marital sex behavior was indirectly affected bysubjective norm, attitude, maternal education, subjective norm, peer norm, and health information center.Conclusion: Healthy pre-marital sex behavior is directly increased with intention and PBC. Healthy pre-marital sex behavior is indirectly affected bysubjective norm, attitude, maternal education, subjective norm, peer norm, and health information center.Keywords: pre-marital sex behaviour, reproduction health information center, Theory of Planned Behavior, path analysisCorrespondence:Mulya Tarmidi. Masters Program in Public Health, Universitas Sebelas Maret, Jl. Ir. Sutami No. 36 A, Surakarta 57126, Central Java. Email:bluedaeng@gmail.com.Mobile: +6285238609735.Journal of Health Promotion and Behavior (2018), 3(1): 78-85https://doi.org/10.26911/thejhpb.2018.03.01.08]]>
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