Problem Statement: While gender as a variable is a significant research and discussion area in foreign language learning, computers are not only common tools in EFL writing classes but also a research subject in foreign language learning. Previous research indicates that female learners have negative attitudes on writing on computers and there have not been certain findings and consensus on gender effect on computerized writing samples of EFL learners. Purpose: This research aimed to investigate the gender effect on writing quality of pen-paper and computerized samples of EFL learners. Method: Writing samples of 20 pen-paper and 20 computer group students were scored analytically and analyzed statistically. Findings and Results: It was found that gender had a significant effect on vocabulary, accuracy, organization, originality and creativity, unity and coherence, relevance, fluency, content, and language control of the samples produced on computer while it had no effect on mechanics of the computerized samples. Recommendations: It is recommended that further research should focus on computer anxiety, interest, and attitudes of female EFL learners. (Contains 2 tables.)