To eliminate requirement for a long time in collecting balls scattered on a court after practicing or playing a game of tennis, and also burden on the waist a person bends down every time to pick up balls one by one for collecting the balls.

A machine which collects balls manually or by power under a standing posture without bending the waist is provided. Balls are scooped up by the advancing of the device and the rotation of a pair of rotary plates on the right and the left, and are guided to the inside of a housing net. The housing net is easily detachable.