Purpose: This study was conducted to investigate changes in knowledge about AIDS, attitude toward AIDS Patients and intention to use condoms after AIDS education. Method: The subjects of this study were 1,900 middle school and high school students in Jollanam-do, Gyeongsangnam-do. Ulsan City, and Daegu City in Korea. Data were collected from September 1st to November 30th 2004 through a questionnaire survey after the subjects received AIDS education. The SPSS 12.0 program was used to analyze the data. Results: There were significant changes in the mean of knowledge (t=-27.02, p=.000), attitude (t=-24.14, p=.000) and intention to use condoms (t=-10.72, p=.000) between before and after the AIDS education. However, only 64.92% of the subjects showed improvement in knowledge about AIDS, 53.39% in attitude toward AIDS person and 19.7% in intention to use condoms. Conclusions: In order to measure the effect of AIDS education. it is necessary to investigate the degree of changes in students brought by the AIDS education as well as changes in the mean value between before and after the AIDS education.