A pulse tube refrigerator, includes a pulse tube; and a regenerator having a low temperature end, the low temperature end being in communication with a low temperature end of the pulse tube via a communicating path, wherein a heat exchanger is provided at the low temperature end side of the pulse tube in the communicating path; the heat exchanger includes a laminated body, the laminated body including at least first and second metal gauzes; the first and second metal gauzes include copper or a copper alloy; interfaces of the metal gauzes are diffusion-bonded to each other; and a side surface of the laminated body is diffusion-bonded to an internal wall forming the communicating path.