In a turbocharger with an oil thrower 36 arranged between a bearing portion 31 for support of a turbine shaft 5 in a bearing housing 3 and an impeller 6 in front thereof, a seal plate 44 facing a front portion outer periphery of the oil thrower 36 for prevention of oil from leaking from the bearing portion 31 to the impeller 6 and being integral with the bearing housing 3 to be positioned at a back of the impeller 6, an oil-thrower facing part 39 formed in the bearing housing 3 to face a rear portion outer periphery of said oil thrower to provide an oil sump 40, the seal plate 44 is in the form of press-fit plate 47, a diameter of the press-fit plate 47 being smaller than an outer diameter of the impeller 6 and being at least equal to a minimum working bore diameter for machining of an outer periphery 42 of the oil-thrower facing part 39 or machining of oil discharge openings 41 provided in the oil-thrower facing part 39.