A supporting device for an electronic device includes a supporting base, a guiding element, an adjusting element, and a latching assembly. The supporting base includes a sleeve portion. The adjusting element includes a first body and an adjusting portion. The adjusting portion is mounted on the sleeve portion. The adjusting portion defines a plurality of adjusting holes. The guiding element defines two latching grooves and is sleeved on the adjusting portion. The latching assembly includes a button, an adjusting rod, and a biasing element. The button is inserted into the coupling portion. The adjusting rod includes a fixing portion and a latching portion. The fixing portion is fixed with the button. The latching portion is latched with the adjusting holes. The biasing element resists the button and the sleeve portion. The button is capable of driving the adjusting rod to move.