The 100-year-old publication, known for its national and international coverage, particularly in politics, will be the first national daily paper to switch to a primarily online-based organization.
"The Christian Science Monitor recognizes that daily print has become too costly and energy-intensive," said editor John Yemma. "There's still a role for print, but one that is geared to weekends, when people still can find time to catch up...and experience the pleasures of print."
Advertising in newspapers has been shrinking as readers increasingly turn to the Web.