A memory module holder includes a base, two latching elements, and a frame. A slot is defined in the base. The two latching elements are rotatably attached to opposite ends of the base. The frame includes a beam portion and two latching portions. The two latching portions are positioned at opposite ends of the beam portion. The latching portions are retained by the latching elements. A receiving space is defined by the frame and the base to receive the memory module when the memory module holder is in a first state. The slot is covered by the beam portion when the memory module holder is in a second state.