The present study "Self-concept and Achievement Motivation of High School Students" was investigated to find the relationship between Self-concept and Achievement Motivation of High School Students. Data for the study were collected using Self-concept Questionnaire developed by Raj Kumar Saraswath (1984) and Achievement Motive Test (ACMT) developed by V. P. Bhargava (1994). The investigator used simple random sampling technique for selecting the sample. The sample consists of 250 high school students. For analyzing data "t" test, ANOVA and Pearson's product moment co-efficient correlation were the statistical techniques used. Finding shows that there is a significant relationship between self-concept and achievement motivation of high school students. (Contains 7 tables.)