A card output device of a shuffling machine including: a base having first and second side walls (101, 102), a roller assembly rotatably mounted between the first and second side walls (101, 102) of the base, and a receiver detachably mounted to the base, the roller assembly including a first set of rollers and a second set of rollers arranged over the first set of rollers, the second set of roller being able to move upwards and downwards between the first and second side walls (101, 102), the device being characterized by: a first gear assembly rotatably mounted on the first side wall of the base and including: a first gear coupled to a motor, which is mounted on the first side wall of the base; a second gear engaged with the first gear, the second gear being coupled to the first set of rollers; a third gear engaged with the second gear; a fourth gear engaged with the third gear; and a fifth gear engaged with the fourth gear, the fifth gear being coupled to the second set of rollers, such that when said second set of rollers move upwards together with said fifth gear, said fifth gear stay engaged with said fourth gear to adapt to output different number of cards. a base having first and second side walls (101, 102), a roller assembly rotatably mounted between the first and second side walls (101, 102) of the base, and a receiver detachably mounted to the base, the roller assembly including a first set of rollers and a second set of rollers arranged over the first set of rollers, the second set of roller being able to move upwards and downwards between the first and second side walls (101, 102), the device being characterized by: a first gear assembly rotatably mounted on the first side wall of the base and including: a first gear coupled to a motor, which is mounted on the first side wall of the base; a second gear engaged with the first gear, the second gear being coupled to the first set of rollers; a third gear engaged with the second gear; a fourth gear engaged with the third gear; and a fifth gear engaged with the fourth gear, the fifth gear being coupled to the second set of rollers, such that when said second set of rollers move upwards together with said fifth gear, said fifth gear stay engaged with said fourth gear to adapt to output different number of cards. a first gear assembly rotatably mounted on the first side wall of the base and including: a first gear coupled to a motor, which is mounted on the first side wall of the base; a second gear engaged with the first gear, the second gear being coupled to the first set of rollers; a third gear engaged with the second gear; a fourth gear engaged with the third gear; and a fifth gear engaged with the fourth gear, the fifth gear being coupled to the second set of rollers, such that when said second set of rollers move upwards together with said fifth gear, said fifth gear stay engaged with said fourth gear to adapt to output different number of cards. a first gear coupled to a motor, which is mounted on the first side wall of the base; a second gear engaged with the first gear, the second gear being coupled to the first set of rollers; a third gear engaged with the second gear; a fourth gear engaged with the third gear; and a fifth gear engaged with the fourth gear, the fifth gear being coupled to the second set of rollers, such that when said second set of rollers move upwards together with said fifth gear, said fifth gear stay engaged with said fourth gear to adapt to output different number of cards.