An infusion pump module for transferring fluid includes a fluid inlet part having an inlet to receive the fluid, a fluid outlet part having an outlet to discharge the fluid, a pump unit having a piezoelectric element, and a flow rate sensor to measure a flow rate of the fluid flowing inside the module, wherein the fluid inlet part, the fluid outlet part, the pump unit, and the flow rate sensor are connected together to cause the fluid received by the fluid inlet part to be discharged from the fluid outlet part, and the fluid inlet part, the fluid outlet part, the pump unit, and the flow rate sensor connected together form a single continuous flow channel.