Abstract: A saw blade hand tool structure includes a handle, an internal insert plate installed in the handle, an assembly head installed at an end of the handle and having an accommodating space with an abutting slope, an elastic element installed between the assembly head and the handle, a tightening assembly formed by a plate, a spring, a displacing member and locking pins, and a saw blade. A recess is formed on the plate which is installed in the assembly head; the locking pin is secured with the internal insert plate; the spring is sheathed on the displacing member which passes into the through hole of the internal insert plate; the displacing member is abutted by the abutting slope of the assembly head; and the saw blade is inserted into the assembly head and positioned by an end of the displacing member to prevent the saw blade from falling out.