A backlight module and an electronic device including the same are provided. The electronic device includes: a panel; and a backlight module opposite to the panel and including: a light guide plate; a first optical unit disposed on the light guide plate and having a first prism structure; a second optical unit disposed on the first optical unit and having a second prism structure; and a third optical unit disposed on the second optical unit and having a third prism structure, wherein the first prism structure faces the light guide plate, and the second prism structure and the third prism structure face the panel.