Abstract This research aimed at investigating the effect of using video-based computer mediated conversation (VBCMC) program on developing EFL preparatory stage students motivation . The participants consisted of (60) EFL second year preparatory stage students. They were randomly selected from Mahelt – EL Qasb School in Kafr – ElSheikh Governorate, Egypt. The research adopted the quasi:- experimental design using two groups: an experimental group (n=30), that received the proposed program, and a control group (n=30) that received the conventional way of teaching. To collect data, the researcher used three instruments: An EFL motivation questionnaire, video -based computer mediated conversation program and teacher's guide. Results showed that experimental group outperformed the control one. This indicated that the (VBCMC) program had a significant impact on increasing the motivation of the participants. Therefore, it is concluded that using (VBCMC) program is effective in improving motivation for second stage students towards learning some English language skills. Keywords: Video-based computer mediated conversation, Motivation, Preparatory stage students, EFL. Introduction:                                      It has been long recognized that the ability to speak a language develops through interaction with other interlocutors. In the case of foreign or second language learning, interaction with other members of the speech community not only helps learners analyze and process linguistic forms (White, 2013), but also it permits them to participate in meaningful social activities (Jacoby and Ochs, 2010).