This study is about the effectiveness of teaching writing on recount text by using Mistake Buster Technique at eighth grade of SMP Islam Asy-syafi’iyah Batealit Jepara in the academic year of 2016/2017. The background of the study is based on the difficulties of students in writing skill using correct grammatical especially in English text. This study is aimed at responding the following question: How is the effectiveness of using Mistake Buster Technique in teaching writing on recount text? The objective of this research is to find out the effectiveness of using Mistake Buster Technique in the teaching writing on recount text at the eighth grade of SMP Islam Asy-syafi’iyah Batealit Jepara in the academic year of 2016/2017.The population of this research was the eighth grade of SMP Islam Asy-syafi’iyah Batealit Jepara. The research method was quantitative with the research design was true experimental research, which was conducted in two classes; experimental class and control class. In taking the sample, the writer used random sampling technique. The experimental class (VIII A) was taught by using Mistake Buster Technique, while control class (VIII C) was taught without Mistake Buster Technique (using conventional method). The methods of data collection are test and documentation. There were two tests; pre test and post test. The formula that used to analyze the data was t-test. It was used to determine whether there was a significance difference between students’ achievement in experimental class and students’ achievement in control class. This research showed that: after collecting data, it was found that the pre test average of the experimental class was 54.034 and control class was 53.167. While, the post test average of the experimental class was 72.483 and control class was 66.733. The obtained t-count was 8.789, whereas the t-table was 1.67 for a: 5%. The t-count was higher than the t-table (8.797 > 1.67). It means that Ha was accepted while Ho was rejected. Since the t-count was higher than t-table there was significance difference in the achievement between students in class VIII A who taught by using Mistake Buster Technique and students in class VIII C who taught without using Mistake Buster Technique (conventional method). In conclusion, mistake buster was an effective technique in teaching writing on recount text in SMP Islam Asy-syafi’iyah Batealit Jepara.