This experimental study aims at investigating the effect of Concept Mapping and self-regulation on the writing competency of the eighth grade students of SMP Negeri 2 Singaraja. The design of this research was posttest only control group with 2x2 factorial arrangement. 60 students were selected as sample through random sampling. The data of students' writing competency were collected by using an essay type test. Meanwhile, data of students' self-regulation level were collected by using questionnaire with Likert scale. The acquired data were analyzed statistically by two way ANOVA at 5% significance level. This research discovers (1) there is a significant difference in writing competency between the students taught with Concept Mapping and those taught with conventional technique. It is proven by the probability value of 0.00, which was lower than 0.05. and (2) there is no significant interaction between the implementation of teaching technique (Concept Mapping and conventional technique) and self-regulation levels (high and low levels) on students' writing competency. It is proven by the probability value of 0.778. it means that Concept Mapping is appropriate to be implemented for low and high self-regulation students. It can be proven from the descriptive analyasis showing that the score of students taught with Concept Mapping is higher than those taught with conventional technique both for high and low self-regulation students. From the descriptive analysis, the mean score of high self-regulation students taught with Concept Mapping = 85.29; meanwhile the mean score of high self-regulation students taught with Conventional technique = 79.82. Meanwhile for low self-regulation students, the mean score of students taught with Concept Mapping = 80.00; meanwhile the mean score of low self-regulation students taught with Conventional technique = 73.97.
keyword : Keywords: concept mapping, self-regulation, writing competency