Phosphor wheel

A phosphor wheel comprising:

• a substrate including a first principal surface and a second principal surface on opposite sides of the substrate;
• a phosphor layer provided on the first principal surface;
• and
• a heat dissipating member disposed facing one of the first principal surface or the second principal surface and rotated along with the substrate, the heat dissipating member being a plate member,
• wherein the heat dissipating member includes:
• a projecting portion provided at a central portion of the heat dissipating member to project toward the one of the first principal surface or the second principal surface, the projecting portion including a contact surface that contacts the one of the first principal surface or the second principal surface;
• and
• a plurality of fins provided by cutting and raising a plurality of regions in a peripheral region of the heat dissipating member excluding the central portion,
• the plurality of regions each include a notch provided by cutting off part of a first side of the region opposite to a second side of the region continuous with a corresponding fin among the plurality of fins, and
• the projecting portion contacts the substrate via the contact surface to secure a certain distance between the substrate and the heat dissipating member and conduct heat in the substrate to the peripheral region of the heat dissipating member.