This article emphasizes the findings of a survey conducted to find out the views of students on the Environmental Education (EE) in Iranian Secondary School (SS) curriculum. A total of six hundred students from forty secondary schools, randomly selected SS from five zones in Tehran City responded to the questionnaire. Two research questions were asked while two hypotheses were tested in this study. The important findings were that: students were not adequately aware of EE in the SS curriculum. No significant difference was found between the male and female students understanding of EE in the curriculum. There was however significant difference between the SS II (Tenth class) and SS III (Eleventh class) students understanding of EE in the curriculum. Based on the findings recommendations are offered to ensure effective and efficient integration of EE into the school curriculum.