Fuel supply device for direct methanol fuel cells

A fuel supply device for direct methanol fuel cells. The fuel supply device for direct methanol fuel cells includes a fuel tank (100) to store a liquid fuel, a cavity plate (200) to store the liquid fuel transferred from the fuel tank (100), a thin film type active pump (300) welded on the bottom of the cavity plate (200) to bring about a movement of the cavity plate (200), and a nozzle plate (400) disposed on the cavity plate (200) to eject the liquid fuel. Accordingly, it is possible to actively control a liquid fuel in a needed amount and supply it to a fuel cell in accordance with a use mode of an electronic device and effectively remove by-products of the fuel cell, thereby improving the efficiency of the fuel cell.