WHO data shows that less than 111 million sexually transmitted infections are suffered by the under 25 age. Young people and adolescents are at high risk for sexually transmitted infections including HIV / AIDS. According to UNAIDS, as many as 67 new cases of HIV / AIDS in developing countries are among young people (15-24 years), 60% are women. In Indonesia until the end of 2000 there were 6050 cases of HIV / AIDS, most of the groups infected were adolescents between 15-29 years, more than 56%.The purpose of this research is to find out factors affecting mother's knowledge le vel about flour albums at Puskesmas L in 2017. Type of this research is descriptive research and analytical research using a cross sectional approach. Respondents were all pregnant women as many as 59 people. Data collection tools with primary data and using univariate and bivariate analysis. Data collection tools with primary data and using univariate and vicariate analysis. The results showed that 45 well-informed mothers (76.3%) and the least knowledgeable mothers were 14 (23.7%). Based on the results of the chi square statistical test variables related to the level of knowledge of pregnant women are educational variables with p value = 0,000 and information sources with p value = 0,000. The conclusion of this study is that the level of knowledge of pregnant women about flour albus in the urban village health centre is relatively good.