Project-Based learning as a motivating instructional method that places students at the core of the teaching. It is a curriculum-based work/profile which needs collaborative work between learners inside and outside the classroom to collect data, to perform research and produce a certain product. The purpose of this study was to investigate the effectiveness of project-based learning in developing English oral communication skills of secondary stage students. The quasi- experimental design was adopted. The participants were two groups which were randomly chosen and assigned to an experimental group (30) from Port Said Governmental Language School and a control group (30) from Abu Bakr Governmental Language School. The English oral communication skills test was developed and administered for collecting data. Descriptive statistics, the t- test and the Cronbach's Alpha coefficient were used for data analysis. The results revealed that project-based learning was effective in developing English oral communication skills of secondary stage students.