Linear actuator

Provided is a linear actuator wherein a moving element can be moved in a direction normal to the direction of arrangement of coils. The moving element 1 has first to third magnets 6a-6c arranged in the X-direction. Each of the first to third magnets 6a-6c has N poles and S poles arranged in the θ-direction. The N poles and S poles of the second magnet 6b are shifted in the θ-direction relative to the N poles and S poles of the first magnet 6a. The N poles and S poles of the third magnet 6c are shifted in the θ-direction relative to the N poles and S poles of the second magnet 6b. A stator 2 has at least two salient poles 8a arranged in the θ-direction, and at least two coils 4a, 4b wound around the salient poles 8a.