A bottle conveyor for a filling machine comprises multiple pairs of bottle-gripping members (1) and a circulating chain conveyor mechanism, and a pair of bottle-gripping members (1) is mounted, via an open-close modular mechanism, to a conveyor chain (100) of the circulating chain conveyor mechanism. The open-close modular mechanism is provided with a rotary support capable of being opened as a V-shape, a synchronization mechanism configured to define the opened V-shape, an elastic mechanism configured to provide a bottle-gripping force to the bottle-gripping member (1) and a self-restoring force for the opened V-shape, and an external force import mechanism. A mechanism configured to open the bottle-gripping members (1) is provided respectively at a bottle entrance location and a bottle exit location of the bottle conveyor, and the mechanism configured to open the bottle-gripping members (1) cooperates with the external force import mechanism to provide an external force. The bottle conveyor can rapidly open or close the bottle-gripping members on the circulating chain conveyor mechanism directly, thus improving the conveyance efficiency and speed, alleviating loading of a motor, and simplifying the structure of a robotic arm and the structure for opening or closing the bottle-gripping members in the filling machine.
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