Abstract: This study investigated teachers’ perception of the introduction of sex education in primary schools in Enugu State, Nigeria. Three research questions and three null hypotheses guided the study. The design of the study was descriptive survey research design. The sample size for the study comprised one hundred and seventeen (117) teachers from the 52 public primary schools in the study area. For even representation, stratified random sampling technique was used to draw eight schools (four urban and four rural) from the Local Government Area.