This report describes the development of a new soldering iron device with electric tweezers for small parts. It is a tool for a manual rework process to small surface mount devices and mainly composed of a gripping mechanism and a heating mechanism of nipper, We use tweezers using buckling phenomenon as a gripping mechanism because of its excellent performance in gripping millimeter or sub-millimeter size workpieces. And for the heating mechanism of gripper, we use simple heat conduction. By using these mechanisms, it is confirmed that the new soldering iron device can get thin tips and quick heating of tweezers.