The Fund said its resident representative in Afghanistan, Lebanese national Wabel Abdallah, 60, died in the bombing and shooting by Taliban suicide attackers on the popular restaurant yesterday.
"This is tragic news, and we at the fund are all devastated," IMF Managing Director Christine Lagarde said in a statement.
"Our hearts go out to Wabel's family and friends, as well as the other victims of this attack."
Abdallah had been the IMF's resident representative in the country since June 2008, and had worked with the Fund since 1993, especially in its Middle East activities.