Gas lift for preventing sagging

A gas lift for preventing sagging, comprising:

• the gas lift comprising a tube and a rod slidably installed inside the tube, and filled with gas inside the tube,
• a moving member for moving with the rod when the rod slides at one side of a portion received inside the tube of the rod,
• a first stopping part coupled to the moving member and for stopping sliding of the moving member primarily in the tube, and
• a second stopping part coupled to the moving member and for stopping sliding of the moving member after the moving member and the first stopping part have been coupled to each other;
• wherein the moving member is formed with a tubular part fixed to the rod, and a coupling part coupled to the first stopping part and the second stopping part sequentially on an upper portion art;
• wherein the first stopping part is a coupling protrusion protruding from an inside surface of the tube, and coupled to an outside surface of the moving member;
• wherein the second stopping part is a stopping member fixedly installed at an upper end of the moving member inside the tube;
• and
• wherein the stopping member comprises a main body, an entrance part having a smaller cross-sectional area toward a lower end thereof so that the moving member easily connects to a lower portion of the main body, and a protruding part protruding along a circumference of the main body on an outside surface of the main body to be coupled to the coupling part.