Provided is an ion beam treatment apparatus. The ion beam treatment apparatus includes a laser generation unit, a dividing part dividing a pulse laser beam generated in the laser generation unit into a first laser beam and a second laser beam, a first target part receiving the first laser beam from the dividing part to generate a first ion beam, a second target part receiving the second laser beam from the dividing part to generate a second ion beam, a first path adjusting part adjusting a path of the first ion beam to irradiate the first ion beam to a treated patient, and a second path adjusting part adjusting a path of the second ion beam to irradiate the second ion beam to the treated patient.