Provided is a panel mounting rack that is capable of preventing a horizontal movement of a panel which is mounted on the rack in a horizontal state even when vibration or another external force is applied. In the panel mounting rack, a plurality of multi-stage supporting units (6) that horizontally support the panel (P) by receiving a circumferential edge portion (X) of the panel are provided along the vicinity of the panel and in an up-and-down direction. The panel mounting rack includes a panel movement regulating unit (7) that protrudes from an outer side of the circumferential edge portion of the panel toward a lower surface of the panel, is provided at an angle with a downward inclination, and has spring properties to push back the circumferential edge portion of the panel and sliding properties to slide the circumferential edge portion of the panel through an elastic deformation due to the load of the panel. When the panel supported by the supporting units is moved in the horizontal direction and shifted in position, the circumferential edge portion of the panel is pushed back elastically and is slid in an inclination direction by the panel movement regulating unit (7) so that the panel is maintained after being returned to a regular mounting position.