Patent ID: 8878142

Claim:
A charged particle beam irradiation apparatus comprising: a transport line configured to transport a charged particle beam; and a rotating gantry rotatable around a rotation axis, wherein the transport line comprises an inclined section configured to make the charged particle beam advancing in a direction of the rotation axis advance to be inclined so as to become more distant from the rotation axis, a rotation section configured to turn the charged particle beam advanced in the inclined section to a rotational direction of the rotation axis; and a bending section configured to bend the charged particle beam turned to the rotational direction to the rotation axis, the rotating gantry is formed of a tubular body which accommodates an irradiated body and supports the transport line, and the inclined section of the transport line is disposed to pass through the inside of the tubular body of the rotating gantry, wherein the rotating gantry has an irradiation chamber in which one end side in a direction in which the rotation axis extends is closed by a back panel, and the inclined section of the transport line is disposed to pass through the back panel and the inside of the tubular body of the rotating gantry.