This research discusses the effectiveness of using Think-Pair-Share with Realia to teach descriptive text writing. In learning English, writing is generally considered the hardest skill. In writing, at least there are five aspects that must be mastered by the students. They are content ,organization,vocabulary,grammar, and mechanic. To make students motivated and enjoyable in learning, the researcher tried to use Think-Pair-Share with realia in teaching descriptive text writing. The use of Think-Pair-Share with realia allows students to transfer their thought coopertively with their patners, so that it makes students easy to finish their work. Realia also facilitated students in writing descriptive text become easier and more concrete. This research is aimed to find the answer of the following research question: how is the effectivenes of using Think-Pair-Share with realia to teach descriptive text writing at the eighth Grade of SMP NU 03 Islam Kaliwungu in the academic year of 2016/2017? and the objective of research is to identify the effectiveness of using Think-Pair-Share to teach descriptive text writing at the eighth Grade of SMP NU 03 Islam Kaliwungu in the academic year of 2016/2017. This research is quantitative research using experimental method. Subjects of this research were 60 students in Eighth Grade of SMP NU 03 Islam Kaliwungu are divided into two classes, namely control class (30) and experimental class (30). The writer collected the data using test and documentation. Furthermore, the data was analyzed by using descriptive statistical analysis technique and the hypothesis used t test. Hypothesis test shows that learning descriptive text writing using TPS with realia is effective.