The present invention discloses a baby stroller includes a stroller frame, a child carrier which is able to be positioned on the frame, and a locking component is able to lock the frame in an unfolding state. Said child carrier can be rotated relative to the stroller frame and allow a folding action of the frame during a pivotal movement of the child carrier relative to the stroller frame. Therefore, present invention allows a user to fold the child carrier and the stroller frame together, which brings convenience in use.