Assistant Professor David Landy, from Academia for Palestine, says a student encampment and pressure from staff encouraged the college to review its ties.
The board of Trinity College has decided to divest from Israel.
It means the university will cut "institutional links with the State of Israel, Israeli universities and companies headquartered in Israel".
The board says the measure will continue for "the duration of ongoing violations of international and humanitarian law".
Assistant Professor David Landy, from Academia for Palestine, says a student encampment and pressure from staff encouraged the college to review its ties.

Over 3,400 Drivers Caught Speeding During Bank Holiday Garda Operation
Gardaí Investigate Discovery Of Man's Body At Dublin Recycling Facility
Charges Dropped Against Asylum Seeker Accused Of Sexual Assault In Saggart Last year
Gardaí Launch Investigation After Body Found In Cork
Ireland Prepares For Winter As Clocks To Go Back This Weekend
Introduction Of Plug-In Solar Panel Technology Approved
Normal People Actors Among Signatures On Letter To UK Government Supporting Sally Rooney
Kildare Saw Significant Increases In Road Deaths This Year