The present invention relates to a coupling device for a tractor instrument having a left-right movement function, and, more specifically, to a coupling device for a tractor instrument having a left-right movement function to lock a slider mounted on a main frame and a frame for coupling to a tractor instrument with movement of the slider by a transfer means. The present invention provides a coupling device for a tractor instrument having a left-right movement function, which comprises a main frame combined in media with a loader coupler on the front end of a loader, and a slider mounted in front of the main frame and having hooking rods and fixing axis insertion holes, respectively, on the upper and lower parts so as to combine with a tractor coupler installed in the tractor instrument, wherein a transfer means sliding the slider to left and right on the main frame is installed between the main frame and the slider, a locking member having a fixing axis penetrating into the tractor coupler to be inserted into the fixing axis insertion hole is installed in the slider so as to lock the tractor coupler to the slider, and an unlocking maintenance means in which the fixing axis is withdrawn from the fixing axis insertion hole and a fixing axis coupling hole to maintain the unlocking state, and a locking introduction piece interfered with one side of the main frame and transferring the unlocking maintenance means so that the fixing axis is inserted into the fixing axis insertion hole and the fixing axis coupling hole by the elastic force in case the slider is transferred by the transfer means are formed to be projected from one side of the main frame.본 발명은 좌우이동기능을 갖는 작업기 연결장치에 관한 것으로, 더욱 상세하게는 메인프레임에 장착된 슬라이더와 작업기연결용 프레임을 이동수단에 의한 슬라이더의 이동을 통해 록킹시키도록 한 좌우이동기능을 갖는 작업기 연결장치에 관한 것이다.이를 위해, 본 발명은 로더 선단부에 로더 커플러를 매개로 결합되는 메인프레임과, 그 메인프레임의 전방에 장착되고 작업기에 설치된 작업기 커플러와의 결합을 위해 상부 및 하부에 각각 걸림봉과 고정축삽입공이 형성된 슬라이더를 포함하는 좌우이동기능을 갖는 작업기 연결장치에 있어서, 상기 메인프레임과 슬라이더 간에는 슬라이더를 메인프레임 상에서
