An exemplary button position rectifying structure includes a cover, a button, and a slide bar located at an inner side of the cover. The button includes a body, an engaging portion and a pair of guiding posts extending from the body. The cover defines a through hole therein. The button is received in the through hole of the cover. The cover defines two guiding holes in the inner side thereof. The guiding posts of the button are received in the guiding holes of the cover, respectively. The slide bar engages with the engaging portion of the button to push the button to move along an axis of the through hole of the cover. Each guiding post of the button abuts one side of the guiding hole of the cover, so that the body of the button is located at a center of the through hole of the cover.