<![CDATA[The use of technology in teaching and learning is an important aspect which has received considerable attention in recent  years.  In a similar  sense,  the use of mobile phone application especially WhatsApp  messenger to  increase effectiveness of instruction has been acknowledged through a number of studies carried out so far. This study was conducted to find the effect of using WhatsApp Messenger on students’ speaking achievement at the second grade students of Madrasah Aliyah Negeri (MAN) 1 Kendari. The research question is that “Is there any significant effect of using WhatsApp messenger on students’ speaking achievement at the second grade students of Madrasah Aliyah Negeri (MAN) 1 Kendari?†This study used a quantitative approach by applying a comparative study. The participants of the study consisted of 60 students who were in two different classes: class XI IPA 2 as the experimental class and class XI IPA 4 as the control class. The experimental class consisted of 30 students taught in a combination method (WhatsApp Messenger and discussion method)  while the control class consisted of 30 students taught through using a conventional method. The  results of this study showed that there  were  differences  in  the  speaking achievement of the students in the experimental class and the control class. This difference was in favor of the experimental class. The value of Chi-Square count is 28.486 and the Chi-Square Table is 19.675. So the H1 accepted and H0 is rejected . The differences between the two classes indicated that integrating the WhatsApp application in teaching English language improved speaking achievement of the students of the experimental class. Keywords: WhatsApp Messenger, Discussion, Speaking  achievement.]]>
