There is provided a charged particle beam treatment apparatus including an accelerator configured to emit a charged particle beam by accelerating a charged particle, an irradiation unit configured to irradiate an irradiation target with the charged particle beam, a beam transport line configured to transport the charged particle beam emitted from the accelerator, to the irradiation unit, a first dose measurement unit that is disposed inside the irradiation unit so as to measure a first dose of the charged particle beam, and a second dose measurement unit that is disposed in the beam trans port line so as to measure a second dose of the charged particle beam. A response frequency of the second dose measurement unit is higher than a response frequency of the first dose measurement unit.
