An electronic device frame includes a housing, a positioning member connecting with the housing, and an inner supporting mechanism. The inner supporting mechanism includes a support member fixed on the housing, a slider slidably connected to the support member, and a fastener connecting the support member to the slider. One of the slider and the supporting member defines a locking slot, in which the fastener is locked. The fastener can lock in any position along the locking slot, such that the slider can maintain different positions and resist the positioning member by moving relative to the supporting member.