A ball bearing inspection device onfigured to detect vibration to be generated from a ball bearing by relatively rotating an outer ring and an inner ring of the ball bearing, the ball bearing inspection device comprising: an arbor configured to support the inner ring of the ball bearing on an outer circumferential surface thereof; a rotary drive unit configured to rotationally drive the arbor; a first pressing unit configured to apply a preload to the ball bearing by pressing the outer ring of the ball bearing supported on the arbor in an axial direction; a second pressing unit configured to apply a preload to the ball bearing by pressing the outer ring in an opposite direction to the pressing direction of the first pressing unit; and a vibration detection unit configured to detect the vibration from the ball bearing, wherein: the arbor comprises: an abutting part protruding radially outward from the outer circumferential surface; at least one moveable flange arranged apart from the abutting part at least by a width of the inner ring; and a flange drive mechanism configured to switch the moveable flange between a first state where the moveable flange protrudes from the outer circumferential surface and a second state where the moveable flange is accommodated in the arbor; and the ball bearing inspection device further comprises a drive force supply unit configured to apply a drive force for switching the flange drive mechanism to the first state or the second state. an arbor configured to support the inner ring of the ball bearing on an outer circumferential surface thereof; a rotary drive unit configured to rotationally drive the arbor; a first pressing unit configured to apply a preload to the ball bearing by pressing the outer ring of the ball bearing supported on the arbor in an axial direction; a second pressing unit configured to apply a preload to the ball bearing by pressing the outer ring in an opposite direction to the pressing direction of the first pressing unit; and a vibration detection unit configured to detect the vibration from the ball bearing, wherein: the arbor comprises: an abutting part protruding radially outward from the outer circumferential surface; at least one moveable flange arranged apart from the abutting part at least by a width of the inner ring; and a flange drive mechanism configured to switch the moveable flange between a first state where the moveable flange protrudes from the outer circumferential surface and a second state where the moveable flange is accommodated in the arbor; and the ball bearing inspection device further comprises a drive force supply unit configured to apply a drive force for switching the flange drive mechanism to the first state or the second state. the arbor comprises: an abutting part protruding radially outward from the outer circumferential surface; at least one moveable flange arranged apart from the abutting part at least by a width of the inner ring; and a flange drive mechanism configured to switch the moveable flange between a first state where the moveable flange protrudes from the outer circumferential surface and a second state where the moveable flange is accommodated in the arbor; and an abutting part protruding radially outward from the outer circumferential surface; at least one moveable flange arranged apart from the abutting part at least by a width of the inner ring; and a flange drive mechanism configured to switch the moveable flange between a first state where the moveable flange protrudes from the outer circumferential surface and a second state where the moveable flange is accommodated in the arbor; and the ball bearing inspection device further comprises a drive force supply unit configured to apply a drive force for switching the flange drive mechanism to the first state or the second state.