A high temperature regenerator of an absorption type hot and cold water generator and an absorption type hot and cold water generator capable of preventing corrosion from occurring by preventing local overheating at the heat transfer surface of the high temperature regenerator and capable of being miniaturized. The high temperature regenerator includes an outer case, an inner case, a plurality of solution pipes, a burner, a solution flow-in pipe, and a gas/liquid separation plate. The inner case is inside the outer case, and a solution is kept between the cases, with the inner case being submerged within this solution. The burner is mounted on the side of the outer case in such a way that heat can be supplied through the inner case, with the inside of the inner case serving as a combustion chamber. A plurality of solution pipes, through which the upper and lower portions of the inner case are connected, are disposed downstream of the combustion chamber, and the inside of each of the solution pipes is filled with the solution. The horizontal cross section of each of the solution pipes is elliptical, and two or more of the solution pipes are disposed so that the straight line portions in the elliptical shape become parallel to each other. The sections between the solution pipes serve as a combustion gas passage.