A three-axis magnetic sensor which is not physically separated from each other and made of one element is provided. A spin-orbit torque is generated through an interface junction between a magnetization seed layer and a magnetization free layer, and through this, a change in an in-plane magnetic field may be sensed in the form of current or voltage in the magnetization seed layer. Further, a tunneling insulating layer and a magnetization pinned layer are formed on the magnetization free layer. The formed structure induces a tunnel magneto-resistance phenomenon. Through this, a change in a magnetic field in a vertical direction is sensed.