An image forming apparatus comprising: a recording head that ejects a liquid droplet; a liquid tank that stores ink to be supplied to the recording head; a first flow path that is communicated with the recording head and the liquid tank; a pump unit that is provided in the first flow path; and a second flow path that is provided parallel to a portion of the first flow path in which the pump unit is provided; characterized by further comprising: a flow path resistance variable unit that is provided in the second flow path configured to change a fluid resistance in the second flow path in accordance with a flow rate and flow direction of liquid flowing through the second flow path and the flow path resistance variable unit; wherein: the flow path resistance variable unit is configured to increase the fluid resistance when liquid is flowing towards the recording head through the flow path resistance variable unit and decrease the fluid resistance when liquid is flowing away from the recording head through the flow path resistance variable unit; and the pump unit is configured to feed, when the liquid droplet is ejected from the recording head, the liquid from the liquid tank to the recording head to increase the flow rate of the liquid flowing toward the recording head from the liquid tank through the second flow path. a recording head that ejects a liquid droplet; a liquid tank that stores ink to be supplied to the recording head; a first flow path that is communicated with the recording head and the liquid tank; a pump unit that is provided in the first flow path; and a second flow path that is provided parallel to a portion of the first flow path in which the pump unit is provided; characterized by further comprising: a flow path resistance variable unit that is provided in the second flow path configured to change a fluid resistance in the second flow path in accordance with a flow rate and flow direction of liquid flowing through the second flow path and the flow path resistance variable unit; wherein: the flow path resistance variable unit is configured to increase the fluid resistance when liquid is flowing towards the recording head through the flow path resistance variable unit and decrease the fluid resistance when liquid is flowing away from the recording head through the flow path resistance variable unit; and the pump unit is configured to feed, when the liquid droplet is ejected from the recording head, the liquid from the liquid tank to the recording head to increase the flow rate of the liquid flowing toward the recording head from the liquid tank through the second flow path. a flow path resistance variable unit that is provided in the second flow path configured to change a fluid resistance in the second flow path in accordance with a flow rate and flow direction of liquid flowing through the second flow path and the flow path resistance variable unit; the flow path resistance variable unit is configured to increase the fluid resistance when liquid is flowing towards the recording head through the flow path resistance variable unit and decrease the fluid resistance when liquid is flowing away from the recording head through the flow path resistance variable unit; and the pump unit is configured to feed, when the liquid droplet is ejected from the recording head, the liquid from the liquid tank to the recording head to increase the flow rate of the liquid flowing toward the recording head from the liquid tank through the second flow path.