PURPOSE: A linear working apparatus is provided to reduce the number of components and to simplify structure by straightly moving back and forth with reduced turning force, thereby reducing costs. CONSTITUTION: A rotating member(14) is combined with the inner side of a body which can freely rotate. A driving shaft is combined with one side of the rotating member. An eccentric shaft is formed on the other side of the rotating member. A fixing part is rotatably combined with the exterior of the eccentric shaft. An intermediate member(20) comprises a male screw part(22) and an external gear(21) which is partly interlocked to an internal gear. A driving member is interlocked to the male screw part and moves back and forth according to the rotation of the male screw part.
