The inventions relate generally to a mounting case for an electro-optical device that includes a main body having a plate member formed by a pressing process, a bottom portion, and side portions continuous with the bottom portion to surround a side edge of the electro-optical panel so that the electro-optical panel may be accommodated therein. A heat-radiating blade corresponding to the circumferential edge of the main body of the plate member is partially formed by a pressing process and extends from the main body to the outside of the main body. A cooling air introducing portion extends from the circumferential edge in a direction toward the bottom portion for directing cooling air across the main body and over the heat-radiating blade for cooling the electro-optical panel. Detailed information on various example embodiments of the inventions are provided in the Detailed Description below, and the inventions are defined by the appended claims.