Fuel cell mounting device

This fuel cell mounting device is provided with: a plurality of fuel cell stacks; piping that is individually connected to each of the fuel cell stacks; a fluid adjustment unit that adjusts the pressure or flow rate of the fluid flowing through the piping; a pressure detection unit that is disposed at a location within the piping where a desired pressure or flow rate of the fluid is required, and that detects the pressure of the fluid; and a control device for controlling the fluid adjustment unit on the basis of the detection result of the pressure detection unit, the piping having a moisture discharge path for discharging moisture separated from hydrogen gas flowing through the fuel cell stack, the fluid adjustment unit being a discharge valve for adjusting the flow rate of the moisture flowing through the moisture discharge path, and the control device being configured to control the fluid adjustment unit on the basis of the detection result of the pressure detection unit. The pressure detection unit is di