A method for manufacturing a liquid cartridge for recycling, the method comprising: a preparing step for preparing the liquid cartridge for recycling, the liquid cartridge for recycling comprising: a liquid accommodating portion configured to accommodate therein a liquid; a flowing path having one end in fluid communication with the liquid accommodating portion and another end formed with an opening; a stopper having an elasticity and configured to be mounted to the opening for covering the opening; and a valve configured to selectively move in the flowing path between an open position to open the flowing path and a closed position to close the flowing path (43 a); and a first step comprising: a first insertion step for inserting an injection member into the stopper mounted to the opening; a first valve open step for moving the valve to the open position; a first injection step for injecting the liquid into the liquid accommodating portion through the injection member while the injection member is inserted into the stopper and the valve is maintained in the open position, after the first insertion step and the first valve open step; a first valve close step for moving the valve to the closed position after the first injection step; a first removal step for removing the stopper from the opening while the valve is maintained in the closed position after the first valve close step; and a first mounting step for mounting a new stopper different from the stopper removed in the first removal step to the opening while the valve is maintained in the closed position after the first removal step. a preparing step for preparing the liquid cartridge for recycling, the liquid cartridge for recycling comprising: a liquid accommodating portion configured to accommodate therein a liquid; a flowing path having one end in fluid communication with the liquid accommodating portion and another end formed with an opening; a stopper having an elasticity and configured to be mounted to the opening for covering the opening; and a valve configured to selectively move in the flowing path between an open position to open the flowing path and a closed position to close the flowing path (43 a); and a liquid accommodating portion configured to accommodate therein a liquid; a flowing path having one end in fluid communication with the liquid accommodating portion and another end formed with an opening; a stopper having an elasticity and configured to be mounted to the opening for covering the opening; and a valve configured to selectively move in the flowing path between an open position to open the flowing path and a closed position to close the flowing path (43 a); and a first step comprising: a first insertion step for inserting an injection member into the stopper mounted to the opening; a first valve open step for moving the valve to the open position; a first injection step for injecting the liquid into the liquid accommodating portion through the injection member while the injection member is inserted into the stopper and the valve is maintained in the open position, after the first insertion step and the first valve open step; a first valve close step for moving the valve to the closed position after the first injection step; a first removal step for removing the stopper from the opening while the valve is maintained in the closed position after the first valve close step; and a first mounting step for mounting a new stopper different from the stopper removed in the first removal step to the opening while the valve is maintained in the closed position after the first removal step. a first insertion step for inserting an injection member into the stopper mounted to the opening; a first valve open step for moving the valve to the open position; a first injection step for injecting the liquid into the liquid accommodating portion through the injection member while the injection member is inserted into the stopper and the valve is maintained in the open position, after the first insertion step and the first valve open step; a first valve close step for moving the valve to the closed position after the first injection step; a first removal step for removing the stopper from the opening while the valve is maintained in the closed position after the first valve close step; and a first mounting step for mounting a new stopper different from the stopper removed in the first removal step to the opening while the valve is maintained in the closed position after the first removal step.