A regenerative refrigerator of a single stage type or a multistage type includes: a cylinder having a cooling stage and a cylinder side wall axially extending from the cooling stage; a displacer having a regenerator provided at the same stage as the cooling stage and a displacer side wall axially extending to face the cylinder side wall, and axially movably disposed in the cylinder; and a low temperature-side gas flow path making a gas expansion space between the displacer and the cooling stage communicate with a low-temperature end of the regenerator and having a gas flow gap between the displacer side wall and the cylinder side wall, and a displacer gas passage making the gas flow gap communicate with the low-temperature end of the regenerator and having a gap-side opening provided further toward a high temperature side than the low-temperature end of the regenerator.