The objective of this study is to explain the effectiveness of using comic strip to teach writing of descriptive text at the eighth grade of MTs NU 05 Sunan Katong in the academic year of 2019/2020. This research method is a quantitative research using an experimental research design. The number of participant of this research is 61 students that were divided into two classes, namely an experimental class (31 students) and a control class (31 students). The researcher used a simple random sampling technique to determine the sample. The data were collected using test, documentation. Furthermore, the data were analyzed using statistical analysis through t-test. The hypothesis test showed that teaching writing of descriptive text through comic strip is effective. Based on the final data calculation of the average difference test showed that the average post-test score of the experimental class was 65.38., while the average post-test from the control class was 55.64.The final result after calculating by using the t-test revealed that tcount = 4.593. andttable= 2.000. If tcount>ttablewith df = n1 + n2 – 2 and α = 5% means Ho was rejected and Ha was accepted. It means that there was significantly different between the experimental and control class.