An optical scanner includes: a light reflecting section having light reflectivity; a movable plate which includes the light reflecting section and can be displaced; four link sections connected to the movable plate; and a supporting section supporting the four link sections. The four link sections are provided on an outer circumference of the movable plate at 90-degree intervals along a circumferential direction of the movable plate in a plan view. Each link section includes a turnable drive section, and a shaft section which connects the movable plate and the drive section. The shaft section is bent and deformed in a thickness direction of the movable plate by turning the drive section.