The invention discloses a baby walker. The baby walker comprises a tray, a supporting device and a base, a seat carrier is fixedly connected with the bottom of the tray, the tray is fixedly connected with the base located at the lower side of the tray through the supporting device, a head adjusting device is fixedly connected with one side face of the tray, the head adjusting device comprises two adjusting portions which are arranged symmetrically, a backrest is arranged between the two adjusting portions, one side face, adjacent to the backrest, of each adjusting portion is provided with a flexible expansion pad, the middle of one side face of each flexible expansion pad is fixedly connected with one side face of a limiting adjuster inside the corresponding adjusting portion, the other side face of each limiting adjuster is in transmission connection with a driving motor inside the corresponding adjusting portion through multiple linkage wheels and linkage rods, and a pressure inductor inside each flexible expansion pad is electrically connected with a microprocessor inside the corresponding flexible expansion pad. By means of the baby walker, the head of a child who uses the walker frequently can be effectively adjusted and corrected, and the hidden trouble that the head of the child is tilted in later-stage development is avoided.