This research aims to determined students science process skills using the PjBL model on cell material in class XI Dayah Insan Qur'ani Aceh Besar for academic year of 2023/2024. Data were collected in September 2023. The research method used was an experiment with a One Group Pretest-posttest Design. The research sample was 30 students. The research instrument used a scientific process skills observation sheet in the form of a checklist questionnaire. Data analysis used the Independent Sample t-test at the 0.05 significance level. The results of the research show that the science process skills of students using the PjBL model have a value of tcount 12.05 > ttable 3.98. The highest indicator was found in observations assessing and collecting data with an average of 21.6%. Overall, students' scientific process skills using the PjBL model are in the very good category (81.25%). It can be concluded that the PjBL model has an influence on the science process skills of class XI students at Dayah Insan Qur’ani, Aceh Besar.