This study examined the effect of teaching english with gestures on the efl iranian school students' achievement in speaking. Forty iranian efl learners participated in this study. On an opt, they were divided into two groups: one control group and one experimental group. For two months, teaching with gestures was done on the experimental group as a treatment. Gestures were regarded as a treatment and as on of the common tools of the nonverbal communication. In the treatment, gestures were used to determine if they had an effect on the students' achievement in speaking. A speaking placement test was given to the experimental group and the control group as the pretest and the posttest, too. According to the resultsobtained by the statistical calculations, the effectiveness of the treatment was not very noticeable. This study suggests that teaching english with gestures cannot be a very effective technique in teaching english. However, they can help students develop some ways to overcome their communication problems to some extenr; moreover, they can be regarded as their natural responses to the situations.