This application provides a voice coil motor, a camera module, and an electronic device, and relates to the field of terminal technologies, to improve precision and increase a speed of controlling movement of a lens assembly by the voice coil motor, and further improve focusing and anti-shake performance of the camera module. The voice coil motor includes: a first magnetic piece, a second magnetic piece, a third magnetic piece, and a counterweight that are radially arranged around an optical carrier sequentially; first coils that are symmetrically fastened on two sides of the optical carrier, where one of the two coils is disposed opposite to the first magnetic piece, and the other of the two coils is disposed opposite to the third magnetic piece; and a first magnetic sensor and a first induction magnet that are oppositely disposed, where the first magnetic sensor is disposed on a side that is of the counterweight and that is close to the optical carrier, and the first induction magnet is fastened on an outer wall that is of the optical carrier and that is close to the counterweight. The first coils are configured to drive the optical carrier to move in a direction of an optical axis with the first induction magnet, and the first magnetic sensor is configured to convert a magnetic field signal generated by the first induction magnet into a first electrical signal.