The present invention relates to a paper cup provided with a heat conduction prevention plate. The paper cup is provided integrally with a heat conduction prevention plate by being attached to the paper cup, and thus it is not necessary for a user to frequently insert a separate heat conduction prevention plate into the paper cup when drinking a drink. Also, a certain space is formed between the integrated heat conduction prevention plate and the paper cup body, thereby effectively performing a heat conduction blocking function. Moreover, since the heat conduction prevention plate is provided in an area that can be held by a finger, it is possible to be manufactured at a low manufacturing cost, and the paper cup widens toward the top, so that the paper cup slips less from fingers.