The invention discloses a scourer, and in particular discloses a cup scourer. The cup scourer is characterized in that: the middle part of a handle is provided with a power supply cover, a power supply groove is formed in the power supply cover, a battery is assembled in the power supply groove, the tail end of the battery is provided with a spring, the spring is connected with a sheet iron, a motor is assembled at the top end of the handle, the handle and the motor are fixed together through a fixing buckle, and the motor is connected with a brush. The cup scourer has the beneficial effects of being small and exquisite, and convenient to use, and enabling inner walls not easy to clean to be easily cleaned up, so that convenience is brought to the lives of users.