<p><span>The study aims at investigating students' reading fluency through mobile assisted extensive reading in effect and responses. Forty-five students (14 males and 31 females) were involved in the study. The participants were asked to read the materials of graded reading in electronic books by using their mobile phone. To measure their reading fluency, reading rate was counted in word per minute. The results show that mobile assisted extensive reading outperformed the students' reading fluency. </span><span>Some participants commented that mobile based extensive reading was likely to build their reading fluency.</span><span> It indicated that mobile might have the potential way not only for reading comprehension but also for reading extensively. <span> </span></span></p>