This research aimed at investigating the effect of video-based computer mediated conversation (VBCMC) program on enhancing EFL preparatory stage students oral performance. 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 regular way of teaching. To collect data, the researcher used three instruments: an EFL oral performance checklist, an EFL oral performance pre-posttest, an EFL oral performance rubric . Results of the research revealed that there were statistically significant differences between the mean score of the experimental group and the control group students in oral performance test in favor of the experimental group. Moreover, the effect size of (VBCMC) program was found to be high. Therefore, this research recommended using (VBCMC) in teaching the four skills of English-language at different educational stages. Keywords: Video – based computer mediated conversation, Oral Performance, Preparatory stage students, EFL. Introduction: Teaching English as a foreign language requires students' exposure to activities for improving reading, speaking, writing and listening. The first and final aim of acquiring