Blended learning approach has become an emerging trend in the field of education and has caught the attention and interest of many researchers as a new approach to encourage students in their learning process. The present study aimed at examining the effectiveness of blended learning in improving Saudi EFL students' English paragraph writing at Shaqra University. The sample of the study consists of 70 EFL students at Shaqra University. The experiment was conducted for six weeks (2018). A pre-test and post-paragraph writing test was used to measure the effectiveness of the blended learning in enhancing paragraph writing skills. Results showed that there were significant differences in the mean scores of the control group (traditional teaching mode) and the experimental group (blended learning) in favor of the experimental group. This proved the effectiveness of blended learning approach in developing Saudi students' competence in paragraph writing.