The Effects of Writing Self-Efficacy and Gender on Writing Performance Park, Young-minKim, Sung-heeThis paper analyzed the effects of writing self-efficacy and gender on writing performance in 1st middle school students. And this paper did the effects of interactions of the tow variables. We measured the quantity and the quality of student writer's text as independent variable. This paper concluded the follows：(1) There were positive corelations of writing efficacy to the text quality and quantity. (2) The upper 30% group of writing efficacy and the lower 30% group had significant differences in the quantity and the quality of student writer's text. (3) The student writer's gender effected on significant differences in writing efficacy and the quantity and the quality of the text. This is, female student gained better points than male did. (4) For the text quality there was significant difference in only male groups of writing efficacy level, but for the quantity the differences in both male groups and female groups of its level.