The purpose of this study was to investigate differences on achievement attribution between male/female school children and between high/low achievement children. The Achievement Attribution Questionaire was administered to 68 mail sixth graders and 61 female sixth graders in Taichung. Based on the grades of monthly examination, 31 children were classified as high achievement, and 22 of them were classified as high achievement. The results of the analysis by x2 tests were as follows. (a)For attribution on success and failure, there were significant differences on personal, family, and school factors between male/female children and between high/low achievement children. All children tended to ascribe personal factors as rresponsible for failure attribution. Male/female children tended to ascribe school factors as responsible for success attribution. High/low achievement children tended to ascribe family factors as responsible for success attribution. Further more, from personal factor analysis, all children tended to ascribed unsuitable motivation-emotion and study habits as responsible for failure attribution, and ascribe suitable study attitude and health as responsible for success attribution. (b)For the stability of attribution, no significant differences were found between male/female children and between high/low achievement children. All children tended to ascribe internal unstable factors, such as lack of effort, as responsible for failure; male children tended to ascribe external stable factors, such as ability, as responsible for success; and female children and high/low achievement children tended to ascrible external unstable factors, such as good luck, as responsible for success. (c)From stepwise analysis, there were significant differences found in some items of all children. Useful strategies for helping low achievement children, and suggestions for future studies also were discussed.