A supporting assembly for an electronic device, includes a mounting piece and a stand. The mounting piece is mounted on the electronic device. The mounting piece includes a connection piece. The connection piece defines a pivot hole. A positioning hole is defined in the connection piece. The stand includes a shaft. A positioning member is secured on the shaft and adapted to rotate together with the shaft. The positioning member includes a plurality of positioning bosses. The shaft is inserted in the pivot hole and rotatable in the pivot hole. Different positioning boss of the plurality of positioning bosses is adapted to be positioned in the positioning holes to hold the stand in different directions relative to the mounting piece.