This study sought to investigate effective communication constraints faced by staff in public universities. The study location wasin Masinde Muliro University of Science and Technology (MMUST), Kenya. The study sample involved 152 academic and administrative staff. Stratified random sampling techniques based on the respondents? job descriptions were employed. Data collection involved use of questionnaires and secondary data for example, the University Act of 2007 and the employee survey findings of 2006. Data was analyzed using descriptive statistics and findings revealed that MMUST staff had experienced constraints in effectively communicating to other members of staff. The study identified the constraints in conveying messages citing lack of adequate working equipment and office space. Key Words: Communication constraints, public universities, Kenya.