Sheizaf Rafaeli (Hebrew: שיזף רפאלי) (born June 7, 1955) is an Israeli researcher, scholar of computer-mediated communication and newspaper columnist.

He has written software and books on graphics, electronic spreadsheets and statistical analysis, and a textbook on information systems for the Open University.

He is co-editor, (with Fay Sudweeks and Margaret McLaughlin), of Network and NetPlay: Virtual Groups on the Internet published by MIT Press, 1998.

He served as founder and co-editor of The Journal of Computer-Mediated Communication, and initiated the SHIL (Citizen's Advice Board) online service.

He writes weekly columns for the Calcalist and Globes financial and business daily newspapers in Israel and the Ynet news site.