Under the Leaf Art Book Fair (UTL) is an annual festival hosting local & international artists-publishers during a week-end in Helsinki, Finland. It features a wide variety of work—from zines and other printed matters, to art publications and artist books. In each edition, events such as music performances, poetry readings, installation art, radio broadcast and food art are happening, as part of the Book Fair programme. The location is yearly changing. UTL is an event for the publishing practices and its community in Finland and around the world.

The Book Fair is co-organised by Hikari Nishida - The Temporary Bookshelf and Sara Blosseville - Fétiche Éditions.