The First Daughter was taking part in a panel discussion about female entrepreneurs alongside German chancellor, Angela Merkel, and IMF chief Christine Lagarde.
But the audience bristled at her praise for the US president.
The event is part of the G20 women's summit.
An audible groan went up as she told the room her father was a "tremendous champion of supporting families and enabling them to thrive".
Mr Trump has been criticised over his attitude to women, especially after a tape of him making obscene remarks was released during the presidential campaign.