PROBLEM TO BE SOLVED: To provide slope variation detection means in a method for stabilizing a slope, which can be structurally constructed simply and inexpensively, is suitable for countermeasure of simple slope stabilization, and can be readily replaced when replacing the slope variation detection means in a method for stabilizing an existing slope.SOLUTION: A slope variation detection structure is used in a method for stabilizing a slope in which a hollow rod 1 is installed as an anchor in the slope and a bearing pressure plate 2 is attached and fastened to a head of the hollow rod 1 to impart a bearing force to a subgrade. A bar-shaped or rope-like slender material 12 is inserted into the hollow rod 1 and a lower end of the slender material 12 is fixed to a lower end of the hollow rod 1, and an upper end of the slender material 12 is made to protrude above the hollow rod. The upper end of the slender material 12 and a bearing member 14 which is above the bearing pressure plate 2 and is detachably fixed to
