The present study examined the effectiveness of task-based instruction (TBI) in improving the reading comprehension ability of EFL students at the University of Tabuk. In order to conduct this study, 80 EFL students at the University of Tabuk, who have taken Placement Test (TUPT) as a pre-test, were chosen for the study. The participants of the study were selected randomly. The researcher used reading comprehension tasks and Placebo Task (Pre- / Post-test) as the research instruments of the study. The findings of this study revealed that students in the experimental group outperformed students in the control group. Thus, task-based instruction was considered to be effective in increasing the reading comprehension ability. Keywords: Tasks, Language learning development, Reading comprehension, EFL students DOI: 10.7176/JLLL/54-02 Publication date:March 31st 2019