The invention discloses a motor for a science popularization teaching aid in the field of electromagnetism scientific research and special operational need, and provides a shaftless motor, which includes a rotor and a stator, and is characterized in that the rotor is made of disc-shaped ferromagnetic material, suspended in an alternating magnetic field formed by the stator, and is driven to rotate under the drive of the alternating magnetic field; the stator is comprises an opened arc potential well for placing the rotor and a tubular carrier wound with a coil; the hollow coil forms a closed magnetic circuit under the action of single-phase alternating current; a U-shaped soft ferromagnet wound with a coil forms an unclosed magnetic circuit under the action of the single-phase alternating current; the electromagnetic field and gravity of the U-shaped soft ferromagnet stator form an arc potential well; the arc potential well keeps the rotor to rotate stably and continuously. The shaftless motor has the advantages of novel structure, wide application range, low manufacture cost and high simplicity in realization.