The purpose of this study is to investigate the relationship between attribution and moral judgment, and the relationship between these two variables and the subjects´ grade and sex. The subjects were 324 first year students of junior high school and 357 first year students of senior high schools. There were 335 males and 346 females, total of 681 students. The results indicates that: (1)about 8096 to 90% of the subjects to be internally controlled; (2) in success events, the senior high students are more internally controlled than the junior high students are; (3) in failure events, the junior high females and senior high males have higher intenal scores than senior high females do; (4) among the internal group, females tend to attribute success to effort more than males do, but there is an interaction between sex and grade in failure events; (5) senior high students´ moral judgment score is higher than that of junior high students; (6) there is no significant relationship between attribution and moral judgment.