Second Language learners' oral task performance has been one of interesting and research generating areas of investigations in the field of second language acquisition specially, task-based language teaching and learning. The main purpose of the present study is to investigate the effect of focus on form and task complexity on L2 learners' oral task accuracy. To this end, sixty intermediate learners of English as a foreign language attending an English institute were chosen as the participant of the study and were divided into three groups control and two experimental groups with and without focus on form strategy. ANOVA and Independent Sample T-test were employed as the statistical means of analysis. The results a of analysis revealed significant differences among the performance of the groups. The study carries significant implications for syllabus and task designers, curriculum developers and language teachers.