Abstract    This study aimed at investigating the effect of computer- mediated corrective feedback in developing EFL learners' performance in grammar. Twenty female Saudi students participated in this study. They enrolled in English course (1st year Diploma) at Al-Alamyia institute for Technology& computer situated in Northern area, Saudi Arabia. They study English as a FL. They were randomly distributed to two groups:  one experimental group which was taught by using the CMC feedback through the ICALL program and a control group that was taught by the traditional computer feedback. A questionnaire was used to measure the attitudes of the students in the two groups towards using the computer feedback . Findings of the study reveal that there were significant differences between the mean scores of the control group and the experimental group in favor of the experimental group which received computer corrective feedback. Results of the questionnaire did not show any significant differences between the attitudes of the two groups towards the program in its two forms of feedback. Both groups found the program helpful and interesting to use in learning grammar.