A cryopump includes a second-stage cryopanel, a radiation shield that surrounds the second-stage cryopanel and has a shield opening, and a first-stage cryopanel provided in the shield opening. The first-stage cryopanel includes a first panel provided with opening regions thereon in a first distribution, and a second panel arranged closer to the second-stage cryopanel than the first panel and provided with opening regions thereon in a second distribution different from the first distribution when viewed in an arrangement direction of the first and second panels.