Detector for detecting thickness of building floor

The utility model belongs to the technical field of building floor thickness detection, and discloses a detector for building floor thickness detection, which comprises a frame body, a placing seat is arranged on the frame body, the inner side wall of the frame body is movably connected with connecting plates, a measuring rod is connected between the two connecting plates, one side of the connecting plate on the left side is provided with a driving structure, and the other side of the connecting plate on the right side is provided with a measuring rod. A lubricating structure is arranged on one side of the driving structure and comprises an oil storage tank and an oil outlet pipe, the oil storage tank is installed on the outer surface wall of the frame body, and the oil outlet pipe is connected to the lower end face of the oil storage tank in a penetrating mode. According to the utility model, through the arrangement of the lubricating structure, when the sound of the driving structure is loud, the driving st