A heat sink comprises: a base portion having one face to be contacted by an exothermic member; a heat pipe erected on the other face of the base portion; and a plurality of fins mounted on the outer face of the heat pipe. Further comprised are: an axially short cylindrical member erected on the other face of the base portion; and a heat pipe container having one end portion closed and the other end portion opened and fitted at its opened end closely in the cylindrical member. The heat pipe is constructed by evacuating the inside of the heat pipe container and then by encapsulating a working fluid in the heat pipe container, so that a heat may be transferred to the heat pipe through the base portion and the cylindrical member.