Abstract: A ball-picking device is used to pick up a ball on a ground surface, and includes a basket frame unit which confines a ball receiving space and which has a ground contacting side formed with a plurality of ball-extension gaps that are in spatial communication with the ball receiving space. Each of the ball-extension gaps is confined by a pair of deformable rod units, and is slightly narrower than a diameter of the ball such that when the ground contacting side of the basket frame unit is moved toward the ground surface to register the ball with one of the ball-extension gaps, the deformable rod units that define a respective one of the ball-extension gaps will be pushed apart and will be deformed by the ball so as to enlarge the respective ball-extension gap and permit extension of the ball into the ball receiving space.