Disclosed is a susceptor for high-temperature use having a shaft with low thermal conductivity, wherein in a susceptor including a plate for wafer mounting and a shaft coupled to the plate, the plate and the shaft each include a sintered body having 90 wt % or more of an AlN phase, the sintered body of the plate is a magnesium-containing AlN sintered body having a volume resistance of 5*108 Ω·cm or more at 650° C., and the sintered body of the shaft is an AlN sintered body having a room-temperature thermal conductivity of 100 W/mK or less.