A bearing device includes a carrier ring, a first bearing portion disposed along an outer periphery of a rotor shaft on a radially inner side of the carrier ring; a second bearing portion disposed along the outer periphery and downstream of the first bearing portion, with respect to a rotational direction of the rotor shaft, on the radially inner side of the carrier ring; a pair of side plates disposed along the outer periphery of the rotor shaft, on both sides of the carrier ring with respect to an axial direction; a first oil guide portion disposed downstream of the first bearing portion and upstream of the second bearing portion, and configured to change a flow direction of oil after passing through a gap between an inner peripheral surface of the first bearing portion and an outer peripheral surface of the rotor shaft to guide the oil.