Abstract: A turbocharger (1) includes a compressor wheel (50) disposed in a compressor housing (12), a turbine wheel (40) disposed in a turbine housing (11), and a shaft (60) that connects the compressor wheel (50) to the turbine wheel (40). The shaft (60) includes a journal portion (63) that adjoins one end and supports journal bearings (7a, 7b), a thrust portion (64) that adjoins the journal portion (63) that supports a thrust bearing (20), a connection portion (66) that adjoins the thrust portion (64) that has surface features (72) formed on an outer surface thereof, and a guide portion (69) that adjoins the connection portion (66). The guide portion (69) and the connection portion (66) are received within a blind bore (58) of the compressor wheel (50) and are configured to connect the shaft (60) to the compressor wheel (50).