Heat dissipating device having increased heat dissipating capacity, light source unit including same heat dissipating device and projector including same light source unit

A heat dissipating device comprising:

• a fixing portion which fixes a first light source;
• a first heat dissipating portion which has a plurality of fins which are provided on a back surface side of the fixing portion;
• a flat plate portion which is erected from the fixing portion;
• and
• a second heat dissipating portion having a plurality of fins which are provided on the flat plate portion,
• wherein first heat dissipating portions are provided at two locations while being spaced apart from each other, and
• wherein the flat plate portion on which the second heat dissipating portion is provided is provided so as to extend between the first heat dissipating portions which are located at the two locations.

A heat dissipating device comprising:

• a fixing portion which fixes a first light source;
• a first heat dissipating portion which has a plurality of fins which are provided on a back surface side of the fixing portion;
• a flat plate portion which is erected from the fixing portion;
• and
• a second heat dissipating portion having a plurality of fins which are provided on the flat plate portion,
• wherein the flat plate portion has a duct portion having a U-shaped vertical section.