The present research aimed at investigating the effect of Hybrid Learning via Google Classroom on developing EFL Preparatory Stage Students' Writing Skills. The study participants were sixty students from the second-year preparatory school chosen randomly from two classes at Nour El-Islam model institute for girls located in Damietta governorate, Alazhar Al-Sharif. They were divided into two groups: experimental group (N=30) and a control one (N=30).  The researcher prepared a checklist of writing skills required for identifying the appropriate writing skills needed for second year preparatory stage students.  A pre-post writing test was developed for the purpose of this study. The present study adopted the quasi-experimental design. The hybrid learning-based program via google classroom was implemented on the experimental group for twelve weeks while the control group received regular instruction. Findings of the study indicated significant differences between the mean scores of the experimental group and those of the control group on the post writing test in favour of the experimental group. The results asserted that using hybrid learning-based program via google classroom helped learners improve the quality of their writing skills.