The purpose of this study is to examine the developmental aspects on attitude toward writing and writing self-efficacy. To do this, data were gathered from 173 sixth to tenth grade in Cheonan and analyzed by statistical methods. The results are following. Firstly, attitude toward writing was not found the developmental trends in grade, regardless of grade students are not so positive writing attitude. Secondly, girls as a group possess more positive writing attitude than boys in all grade levels. Thirdly, writing self-efficacy indicated negative developmental trends in sixth to tenth grade levels and writing self-efficacy score went up somewhat in tenth grade, but there was not statistically significant difference. Fourthly, regarding gender difference on writing self-efficacy, results showed that the score of boys is higher than that of girls, but there was not statistically significant difference.