To provide a tennis ball collector used in collecting a number of tennis balls hit out to a ground in training, etc.

The inlet edge 1b of the ball collecting net bag 2 with the closed bottom part 2a is connected to the metallic mouth frame 3 connected to the shank rod 4. A ball guide flapper 5 whose rear end edge at height suitably above the inner bottom face 3a1 of the bottom part 3a of the metallic mouth frame 3 is formed into the ball stopper 5b and upper face into the tilted guide face 5a is equipped on this ball collector.