A fuel cell vehicle includes a fuel cell, a fuel storage container, a container installation space, a fill lid box, and a fuel gas detector. The fuel cell is to generate power through an electrochemical reaction between a fuel gas and an oxidant gas. At least part of the fuel storage container is disposed in the container installation space. The fill lid box includes a gas fill port inside the fill lid box and has a communication hole to connect an inside of the fill lid box with the container installation space. The fuel gas is to be supplied through the gas fill port into the fuel storage container from an outside of the fuel cell vehicle. The fuel gas detector is disposed inside the fill lid box to detect a fuel gas leakage and to detect a fuel gas density in the container installation space.