To provide a heat sink using a heat sink sheet made of a metal preventing electrolytic corrosion from occurring.

The heat sink 10 made of the electrolytic corrosion preventing metal comprises: laminates 1, 5 each having a low melting point metal layer 3 having a melting point of 130°C or lower, a high melting point metal layer having a melting point exceeding 130°C, and ceramic layers 2, 4 interposed between the layer 3 and the layers 1, 5. The thickness of the layer 3 is preferably in a range of 30 to 200 μm to maintain the heat sink high. Thicknesses of the layers 2, 4 are in a range of 10 to 150 μm to perform electrolytic corrosion proofness and is preferable so as not to lower its heat conductivity. The layers 2, 4 are formed by spraying, printing or brush-coating a powder of alumina, silica or the like, drying and sintering it.