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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