Using multimedia audio-visual aids stimulates thinking and improves learning environment in a classroom and they can be a helpful tool in the language classroom (Mannan, 2005). The present study made an effort to investigate the effect of using multimedia visual aids on the learners’ oral (speaking) skill. This study is an experimental research and two groups of learners in a language institute were chosen to participate in the experiment. The participants of the study were made up of 68 advanced EFL learners in a language institute in Mashhad. To homogenize the study subjects to select an appropriate sample, a placement test was administered, and 60 students were selected. Then, they were randomly classified into two groups, i.e., control and experimental groups (30 Ss in each group). The participants of the experimental group were exposed to the multimedia visual aids in their classes, while the EFL students of the control group were instructed through the conventional teaching method and using ordinary material. The results indicated that the use of multi-media visual aids could positively impact the Iranian EFL learner's' speaking ability. Findings of this study have numerous implications for language teachers, practitioners and administrators. Manuscript profile