A rotor includes: a tubular retaining ring opened on an outer side thereof in an axial direction and covering a coil end portion of each of coils; and rotor baffles and insulation baffles alternately connected in a circumferential direction and partitioning a space in the retaining ring into a first space and a second space, the first space is formed over an entire circumference around a shaft, each rotor baffle includes, at a part thereof on a radially outer side of which a jumper portion is present, a first tapered shape part tilted so as to be more apart from the jumper portion toward a center side in the axial direction of the rotor.