A walking aid includes a pair of first supporting feet, a pair of second supporting feet and a pair of connecting rods.The two first supporting feet are connected by a cross bar, and each first supporting foot includes an outer tube, an inner tube and a push rod.The inner pipe part is arranged in the outer pipe, and the inner pipe is provided with a pressing part.One end of the push rod is provided with a tight fitting part, the push rod part is arranged in the inner pipe, and the tight fitting part is sleeved in the pressing part.The push rod has a first state and a second state relative to the inner tube.In the first state, the pressing part pushes the fitting part against the inner wall of the outer pipe.In the second state, the fitting part is not pushed by the compression part, and the fitting part is not against the inner wall of the outer pipe.The two second supporting feet are arranged on the opposite side of the first supporting feet.The two connecting rods are respectively connected with the first supporting feet and the second supporting feet.一種助行器，包括一對第一支撐腳、一對第二支撐腳及一對連桿。兩第一支撐腳以一橫桿連接，每一第一支撐腳包括一外管、一內管及一推桿。內管部分設置於外管內，內管設有一壓迫部。推桿一端設有一緊配部，推桿部分設置於內管內，緊配部套設於壓迫部。推桿相對內管具有一第一狀態及一第二狀態。於第一狀態時，壓迫部推擠緊配部，緊配部抵於外管內壁。於第二狀態時，緊配部不受壓迫部推擠，緊配部不抵於外管內壁。兩第二支撐腳設置於該對第一支撐腳的對側。兩連桿分別連接該對第一支撐腳及該對第二支撐腳。
