A cooling unit for cooling a heat generating component includes a heat
receiving portion thermally connected to the heat generating component and
a heat radiating portion including first and second radiating members
having thermal conductivity. The first and second radiating members are
overlaid on each other and define a path for allowing a cooling medium
heated by the heat generating component to flow through the path. A pump
circulates the cooling medium between the heat receiving portion and the
heat radiating portion.