The background of this research is based on the phenomenon that most students demonstrated low speaking profeciency. It was very rare to find the students who can speak English fluently because they lack of linguistics awareness in grammar, vocabulary, pronunciation, fluency and comprehension. In order to create an interesting and enjoyable activities in the classroom, the teacher should be able to use different media to facilitate the teaching process since technology has brought innovation in education especially in language teaching. Vlogs as media in teaching speaking can accomodate students’ interest because students sometimes more like watching videos than reading a book. The main objective of this research is to explain the effectiveness of using video blog (vlog) to teach speaking of explanation text. The researcher used quantitative approach and the research design used an experimental research. The sample of this research were XI 3 as experimental class which was taught by using video blog (vlog) and XI 2 as control class which was taught by using blog. Based on the collecting data, it was obtained that tcount = 4.63 and ttable = 2.02. it showed that tcount > ttable (4.63 > 2.02). so H0 is rejected and Ha is accepted. It means that, teaching speaking of explanation text by using video blog (vlog) is effective. Based on the result findings, it can be concluded that the use of vlog in teaching speaking of explanation text is effective. Therefore, it is recommended that vlog can be implemented as one of the effective teaching media for the teacher to teach speaking skills and for future researcher can use the same kind of research with different sample and condition.