Background:

Adolescence is a time of storm and stress , because adolescents experience many challenges both

from themselves ( biopsychosocial factors ) and the environment environmental factors ). Adolescents who do not

have the ability to face chall enges, can end up in various complex health problems as a result of their risky

behavior . This research is done to find out information about sex with premarital sexual behavior among

adolescents in the basic community group (KUB) St. Yakobus Rasul Naimata Kupang , East Nusa Tenggara in

2019. The methode of this research is o bservational with cross sectional design. The research subjects were

adolescents aged 14 17 in the basic community group (KUB) Yakobus Rasul Naimata, Kupang City. The sampling

technique is the total population with a sample size of 1 00 people. Data collection us ed a questionnaire. The data

analysis technique used univariate and bivariate analysis using the chi square test. It shows that variables related

to premarital sexual behavior in adolescents are sources of information about sex (p value 0.02), comfort /

openness of talking about sex (p value 0.014), access to sexual information from printed media (p value 0.033),

reading / watching themed sex (p value 0.044) and programs favored by adolescents (p value 0.049), while the

variable not related to premarital sexual behavior among adolescents was the time to read / watch sex themed (p

value 0.383).

Keywords: Information about sex, adolescent sexual behavior.