A crutch includes: a crutch, including: a main rod； a bracket assembly, which is combined with the main rod, and the bracket assembly includes a movable seat, at least a connecting boom and at least a pair of levers corresponding to the connecting boom, the movable seat can be slidably combined with the main rod, the connecting boom is pivoted to the main rod, the pair of levers are pivoted to the movable seat and the connecting boom； and a limiting member, the limiting member The movable seat can be positioned to control the opening and closing of the auxiliary bar relative to the main bar.By means of the limit assembly of the main pole, the movable seat of the support assembly can be positioned at different positions on the main pole, so as to close or open the auxiliary pole, so that the user can adjust the support area at any time, so as to achieve the effect that can be widely used in different conditions and needs.一種拐杖，包含：一種拐杖，包含：一主桿；一支架組件，結合於該主桿，該支架組件包含一活動座、至少一連動臂及對應該連動臂的至少一副桿，該活動座可滑動地結合於該主桿，該連動臂樞接於該主桿，該副桿樞接於該活動座及該連動臂；及一限位件，該限位件可以將該活動座定位，以控制該副桿相對於主桿張開及收合。藉由該主桿之限位組件，可將該支架組件之活動座定位於該主桿上的不同位置，以收合或張開該副桿，讓使用者可隨時調整支撐面積，達到可廣泛應用於不同狀況及需求的功效。
