Introduction. AIDS is a pandemic disease and a health problem of the world. It is also important in Iran and 14000 HIV patients have been reported in this country, soldiers with high risk bihavior were at risk for HIV infection and aim of this study was evaluation effect of education on knowledge and attitude about HIV in them.

Material and Methods. This study is a cross-sectional that conducted in 205 soldier of Baqiyatallah university in capital city of Iran in 2007.Demography data and self administer question chart implicaed in pretest and post test .After pretest, soldiers divided in randomly to three group as control without education, pamphlet and face to face education group .Data was analyzed with SPSS 12 program and T.test and chi-square was used.

Results. In here all soldiers was man with mean age 22.1±1.8 SD, eduction level was in 9(4.4%) primary school and 50(26.3%) above diploma. Mean level of knowledge was17.5±4.5 and 56.7% had low and 18.5% had good level knowledge. Mean of attitude was 4.8±1.7 that 75.6% had negative attitude about HIV. These three group before education had no significant different in knowledge, attitude and practice. Knowledge and attitude were increased after education that significant different with control group in post test.

Discusion. High knowledge about this disease can diminished transsmion of HIV infection.This study showed that knowledge about HIV was low in 50% and attitude was negative in 75%. For this reason, we considered necessary of education about HIV for soldiers and pamphlet increased knowledge and face to face education increased the attitude.