The current study was conducted to investigate the effects of using Microsoft Office Word on Iranian EFL lecturers’ grammar knowledge and their attitudes towards using them to support their grammar knowledge. To this end, 14 Iranian EFL lecturers, who had M.A. degrees in TEFL, containing eight males and six females participated in this study. The participants were randomly divided into equal groups of control and experimental. The participants in the experimental group worked with Microsoft Word and the participants in the control group worked with pens and papers during the study. The participants were asked to write a text about a specific subject and express their opinions about that subject. The results were collected and perused by the help of the supervisor of the study who had a Ph.D. degree in TEFL for checking the possible grammatical errors or mistakes. The results indicated that Microsoft Word was indeed beneficial to the grammar of the participants of experimental group because they got significantly higher grammar scores than the participants of the control group did. The results of this study offer practical implications for applying computer for language teaching and improvement of EFL learners’ writing skill.
