Abstract: A buoyant hand tool comprises a rod body having a driving portion and an insertion portion; a handle; the insertion portion of the rod body being inserted into the handle and being completely sealed; the handle having a chamber which is filled with air or is vacuumed; the chamber being completely sealed and being waterproof, and thus the buoyant hand tool is buoyant in water. A connection of the rod body and the handle has a protrusion seat which encloses the insertion portion. The driving portion has a cruciform head or a straight head, or the driving portion has a socked at a head thereof, or a ratchet at a head thereof, or a ring head or an opened head.