Office of the Dean, Faculty of Science, Mahidol University consists of 13 division
- Educational Service Unit
- Student Affair Unit
- Undergraduate Curriculum Unit
- Document Unit
- Library Resources and Services Unit
- Research Information Resources Unit
- Academic Information Technology Unit
- Archives and Museum Unit
- Public Relations Unit
- Special Affairs Unit
- Documents and Records Unit
- Personnels Unit
- Physical and Environmental Unit
- Reception and Information Services Unit
- Computer and Communication Unit
- Software Development Unit
- Audio-visual Unit
- Finance Unit
- Accounting Unit
- Budget Unit
- Procurement Unit
- Research Grant, Academic Service and Educational Scholarship Unit
- Business Development Unit (BDU)
- Plan and Development Unit