A bag supply system comprising: a bag making machine; a bag bundle positioning device which sequentially arranges bag bundles in a delivery relay position (Pr), each of the bag bundles including two or more bags supplied from the bag making machine; and a bag bundle delivery device which moves the bag bundles from the delivery relay position (Pr) to a delivery zone (Zr), characterized by further comprising: a bag bundle conveyance device which has a support part being capable of moving, receives the bag bundles from the bag bundle delivery device in the delivery zone (Zr), and conveys the bag bundles from the delivery zone (Zr) to a supply zone (Zd) in a state where the bag bundles are supported by the support part; a bag bundle takeoff device which holds the bag bundles supported by the support part in the supply zone (Zd) and moves the bag bundles from the bag bundle conveyance device to a supply relay position (Pd); and a bag supply device which sequentially supplies bags included in each of the bag bundles arranged in the supply relay position (Pd), to a packaging machine comprised in the bag supply system, wherein the support part moves along an endless track (Tc) between the delivery zone (Zr) and the supply zone (Zd). a bag making machine; a bag bundle positioning device which sequentially arranges bag bundles in a delivery relay position (Pr), each of the bag bundles including two or more bags supplied from the bag making machine; and a bag bundle delivery device which moves the bag bundles from the delivery relay position (Pr) to a delivery zone (Zr), characterized by further comprising: a bag bundle conveyance device which has a support part being capable of moving, receives the bag bundles from the bag bundle delivery device in the delivery zone (Zr), and conveys the bag bundles from the delivery zone (Zr) to a supply zone (Zd) in a state where the bag bundles are supported by the support part; a bag bundle takeoff device which holds the bag bundles supported by the support part in the supply zone (Zd) and moves the bag bundles from the bag bundle conveyance device to a supply relay position (Pd); and a bag supply device which sequentially supplies bags included in each of the bag bundles arranged in the supply relay position (Pd), to a packaging machine comprised in the bag supply system, wherein the support part moves along an endless track (Tc) between the delivery zone (Zr) and the supply zone (Zd). a bag bundle conveyance device which has a support part being capable of moving, receives the bag bundles from the bag bundle delivery device in the delivery zone (Zr), and conveys the bag bundles from the delivery zone (Zr) to a supply zone (Zd) in a state where the bag bundles are supported by the support part; a bag bundle takeoff device which holds the bag bundles supported by the support part in the supply zone (Zd) and moves the bag bundles from the bag bundle conveyance device to a supply relay position (Pd); and a bag supply device which sequentially supplies bags included in each of the bag bundles arranged in the supply relay position (Pd), to a packaging machine comprised in the bag supply system, wherein the support part moves along an endless track (Tc) between the delivery zone (Zr) and the supply zone (Zd).