PROBLEM TO BE SOLVED: To provide a neutron capture therapy system capable of improving use efficiency.SOLUTION: A neutron capture therapy system 1 includes: an irradiation chamber 3 in which a neutron beam is applied to a patient Q placed on a placement base part 30； a neutron beam generation part 11 for applying the neutron beam N to the inside of the irradiation chamber 3； a preparation chamber 10 isolated from the irradiation chamber 3； a treatment couch traveling part 40 to which the placement base part 30 is removably attached and that is movable between the irradiation chamber 3 and the preparation chamber 10； and an exchange processing part 55 provided in the preparation chamber 10 and capable of exchanging the placement base part 30 to be attached to the treatment couch traveling part 40.SELECTED DRAWING: Figure 1
