The study was on electronic register and teachers’ absenteeism. The objective of the study was to examine the effects of electronic register on teachers’ absenteeism in Osadenis mixed secondary school Delta state, Nigeria. Specifically, the study ascertained if the use of electronic register has helped in reducing teachers’ absenteeism to work in Osadenis mixed secondary school Delta state, Nigeria. The study was a survey research. Simple random sampling procedure was used. The primary and secondary sources of data were employed. Behavioural change theory was adopted. The findings revealed that the use of electronic register has reduced teachers’ absenteeism from work. Other findings showed that ghost workers no longer find it easy because of the use of thump print during clocking–in and clocking-out of work. It has helped to enforce punctuality. Based on the findings, the following recommendations were made. There should be a reasonable deduction on the salary of any teacher who absent from work without an acceptable reason and permission from the management. There should be improvement on the function of the machine via provision of constant light and trained experts to manage and maintain the device.