A turbocharger comprising: a rotating shaft that is combined with a turbine rotor and a compressor rotor, which are disposed side by side, respectively, and rotates together with the turbine rotor and the compressor rotor; a rolling bearing that includes an inner ring combined with the rotating shaft, an outer ring disposed on a radial outer side of the inner ring, and a plurality of rolling elements sandwiched between a raceway of the inner ring and a raceway of the outer ring, and supports the rotating shaft; a housing that has a space which houses the rolling bearing and holds the outer ring fitted into this space; a lubricant supply structure for supplying a lubricant to a space between the outer ring and the inner ring and to clearance between an outer peripheral surface of the outer ring and an inner peripheral surface of the housing, respectively; and a lubricant discharge structure having a first discharge passage for discharging the lubricant from opening ends of the outer ring on both sides in an axial direction, and a second discharge passage for discharging the lubricant from the openings aligned and formed so as to communicate with an axially intermediate portion of the outer ring and a peripheral wall part of the space, respectively, wherein the housing includes a first dam (68A, 68B, 168A, 168B) that is disposed adjacent to a lower portion of the opening end of the outer ring and restricts an outflow of the lubricant through the first discharge passage, and a second dam that is disposed in the openings formed in the outer ring and the peripheral wall part of the space and restricts an outflow of the lubricant through the second discharge passage, characterised in that an end part region which connects grooved raceway and an end part of the outer ring facing in the axial direction is formed on the inner peripheral surface of the outer ring, wherein a radial position of the end part region is located closer to the inner ring than the raceway formed on the outer ring, wherein a radial position of a top part of the first dam (68A, 68B, 168A, 168B) is located closer to the inner ring side than the end part region, and wherein one open end of the clearance communicates with the space between the outer ring and the inner ring between the end part of the outer ring and the first dam (68A, 68B), and wherein the other open end of the clearance communicates with the space between the outer ring and the inner ring between the openings (58, 67) formed in the outer ring and the second dam. a rotating shaft that is combined with a turbine rotor and a compressor rotor, which are disposed side by side, respectively, and rotates together with the turbine rotor and the compressor rotor; a rolling bearing that includes an inner ring combined with the rotating shaft, an outer ring disposed on a radial outer side of the inner ring, and a plurality of rolling elements sandwiched between a raceway of the inner ring and a raceway of the outer ring, and supports the rotating shaft; a housing that has a space which houses the rolling bearing and holds the outer ring fitted into this space; a lubricant supply structure for supplying a lubricant to a space between the outer ring and the inner ring and to clearance between an outer peripheral surface of the outer ring and an inner peripheral surface of the housing, respectively; and a lubricant discharge structure having a first discharge passage for discharging the lubricant from opening ends of the outer ring on both sides in an axial direction, and a second discharge passage for discharging the lubricant from the openings aligned and formed so as to communicate with an axially intermediate portion of the outer ring and a peripheral wall part of the space, respectively, wherein the housing includes a first dam (68A, 68B, 168A, 168B) that is disposed adjacent to a lower portion of the opening end of the outer ring and restricts an outflow of the lubricant through the first discharge passage, and a second dam that is disposed in the openings formed in the outer ring and the peripheral wall part of the space and restricts an outflow of the lubricant through the second discharge passage, characterised in that an end part region which connects grooved raceway and an end part of the outer ring facing in the axial direction is formed on the inner peripheral surface of the outer ring, wherein a radial position of the end part region is located closer to the inner ring than the raceway formed on the outer ring, wherein a radial position of a top part of the first dam (68A, 68B, 168A, 168B) is located closer to the inner ring side than the end part region, and wherein one open end of the clearance communicates with the space between the outer ring and the inner ring between the end part of the outer ring and the first dam (68A, 68B), and wherein the other open end of the clearance communicates with the space between the outer ring and the inner ring between the openings (58, 67) formed in the outer ring and the second dam.