To maintain the total heat radiation quantity of plural condensation parts and to hold an environment where the plural condensation parts are placed.
In the cooling device of a notebook-type personal computer, a heat transmission block 10 placed in a central arithmetic processing unit 9 so that it can transfer/receive heat and a heat pipe 12 connected to the heat transmission block 10 so that it can transfer/receive heat are installed and an evaporation part 13 and condensation parts are formed in the heat pipe 12. The plural condensation parts 14 and 15 are formed in the single heat pipe 12 and heat transportation quantity in at least a part of an area between the condensation part 14 and the evaporation part 13 differs from that in a part of an area between the condensation part 15 and the evaporation part 13.
MOCHIZUKI MASATAKA
MASUKO KOICHI
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