A bearing (12) being a recessed section that receives a spindle (20) is provided in a lower surface (10B) of a susceptor (10). The bearing (12) has a tapers from the lower surface (10B) towards an upper surface (10A). A gap (12B) is provided in an side wall (12A) of the bearing (12), further on the outside of the bearing (12) than a fitting surface (12X) between the bearing (12) and the spindle (20) in the horizontal direction. As a result, reduction in the fitting force between the susceptor bearing and the spindle can be suppressed and susceptor temperature reduction in the vicinity of the bearing can also be suppressed.