A carbon fiber bundle with an adhered sizing agent, which comprises a carbon fiber bundle and a sizing agent adhered to the surface thereof, provides a carbon fiber bundle with elevated abrasion-resistance, and at the same time superior fibrillation. The carbon fiber bundle with an adhered sizing agent is characterized in that the sizing agent contains an epoxy compound, and in a measurement at 25°C, the intersection of the storage modulus and the loss modulus shows an angular frequency within a range of 1 x 10 5 – 1 x 109 rad/sec.