A mobile carrier includes a first frame, a rigid wheel, a second frame, a steering adjustment mechanism and a steering wheel. The rigid wheel is pivoted to the first frame. The second frame is pivoted to the first frame. The steering adjustment mechanism is connected to the second frame. The steering adjustment mechanism includes a first rotating element and a second rotating element coupled to the first rotating element. The steering wheel is pivoted to the second rotating element. When a first rotating axis of the first rotating element is perpendicular to a plane, the first rotating element and the second rotating element are locked to each other, and the first rotating element and the second rotating element are capable of rotating around the first rotating axis simultaneously. When a second rotating axis of the second rotating element is perpendicular to the plane, rotational degree of freedom of the first rotating element is restricted, and the second rotating element is capable of rotating around the second rotating axis relative to the first rotating element.一種移動載具包括第一支架、定向輪、第二支架、轉向調整機構以及轉向輪。定向輪樞接第一支架。第二支架樞接第一支架。轉向調整機構連接第二支架。轉向調整機構包括第一旋轉件與耦接第一旋轉件的第二旋轉件。轉向輪樞接第二旋轉件，當第一旋轉件的第一旋轉軸線垂直於地面時，第一旋轉件與第二旋轉件彼此鎖定，且第一旋轉件與第二旋轉件能夠沿著第一旋轉軸線同步旋轉。當第二旋轉件的第二旋轉軸線垂直於地面時，第一旋轉件的旋轉自由度被限制，且第二旋轉件能夠沿著第二旋轉軸線相對於第一旋轉件旋轉。
