A lifting apparatus for a highly-mounted device, comprising: a main body installed at a predetermined height so that a drum for winding a wire rope and a first driving motor for giving a rotating force to the drum are installed thereto; a lifting body suspended from the wire rope and having a device coupling portion provided at a lower end thereof; an accommodation structure located at a lower portion of the main body and having an open lower portion so as to be coupled with the lifting body; a stopper installed at the accommodation structure and caught by a suspending protrusion provided to the lifting body to give an anti-falling function for the lifting body; an upper contact point and a lower contact point respectively installed at the main body and the lifting body to make contact with each other when the lifting body is moved up and coupled to the main body by winding the wire rope; at least one guide roll disposed at a side portion and an upper portion of the drum to support the wire rope unwound from the drum and guide the unwound wire rope into the accommodation structure; and a fixing instrument configured to apply a force to any one of the upper contact point and the lifting body in a state where the lifting body is moved up and coupled to the main body by winding the wire rope, so that the lifting body comes into close contact with the stopper; characterized in that the fixing instrument includes a second driving motor fixed to the main body, and a screw bolt rotated by the second driving motor and coupled to a screw nut to be movable forward and backward in an upper and lower direction or in a left and right direction, and wherein when the screw bolt moves forward, the screw bolt compresses the lifting body, or a portion connected to the lifting body, to push the lifting body downward so that the lifting body comes into close contact with the stopper. a main body installed at a predetermined height so that a drum for winding a wire rope and a first driving motor for giving a rotating force to the drum are installed thereto; a lifting body suspended from the wire rope and having a device coupling portion provided at a lower end thereof; an accommodation structure located at a lower portion of the main body and having an open lower portion so as to be coupled with the lifting body; a stopper installed at the accommodation structure and caught by a suspending protrusion provided to the lifting body to give an anti-falling function for the lifting body; an upper contact point and a lower contact point respectively installed at the main body and the lifting body to make contact with each other when the lifting body is moved up and coupled to the main body by winding the wire rope; at least one guide roll disposed at a side portion and an upper portion of the drum to support the wire rope unwound from the drum and guide the unwound wire rope into the accommodation structure; and a fixing instrument configured to apply a force to any one of the upper contact point and the lifting body in a state where the lifting body is moved up and coupled to the main body by winding the wire rope, so that the lifting body comes into close contact with the stopper; characterized in that the fixing instrument includes a second driving motor fixed to the main body, and a screw bolt rotated by the second driving motor and coupled to a screw nut to be movable forward and backward in an upper and lower direction or in a left and right direction, and wherein when the screw bolt moves forward, the screw bolt compresses the lifting body, or a portion connected to the lifting body, to push the lifting body downward so that the lifting body comes into close contact with the stopper.