FUEL SUPPLY DEVICE

A fuel supply device includes a fuel tank having an internal space configured to store fuel, a tube member having a flow path therein and having one side connected to the fuel tank and the other side connectable to an external component, and an opening/closing control unit coupled to the tube member and configured to control an operation of opening or closing the flow path of the tube member. The opening/closing control unit is configured to close the flow path of the tube member based on a rate (dP/dt) of pressure change over time of the fluid being greater than or equal to a predetermined value.