The utility model relates to a replaceable foot seat of a crutch.It includes: a crutch,A base,One outer casing,One strut set and one foot seat,And the supporting rod group is composed of a supporting rod,One elastic element,One inner guide block,A spring and a fixed part are combined.Among them,The base is a shell with a spherical guide surface.An enlarged middle hole is arranged in the center of the spherical guide surface.A joint part is arranged under the inner part.A joint section is arranged around the foot seat.The foot base can be combined with the joint part of the base through the joint section.The bottom surface of the foot seat is provided with at least one supporting unit.When in use, the support unit makes contact with the ground.一種拐杖之可替換腳座，其包含有：一拐杖、一底座、一外套管、一支撐桿組與一腳座，且該支撐桿組是由一支撐桿、一彈性元件、一內導塊、一彈簧與一固定件組合構成，其中，底座為具有球狀導面的殼狀體，該球狀導面中央設有一擴大的中孔，內部下方設有接合部，腳座外周設有接合段，讓腳座能透過接合段與底座的接合部做結合，該腳座底面並設有至少一撐地單元，當在使用時即以該撐地單元與地面做接觸。
