Fuel supply device

An inexpensive fuel supply device having a high output is achieved using low-output fuel pumps. First and second pumps (20,21), which are two inexpensive pumps having a low output, are disposed on a common mounting seat (6) an inlet (30,31) of each of the fuel pumps approaches a common fuel filter (26), discharge ports (22,23) are connected to a common discharge passage (24) so that the amount of fuel corresponding to the sum of the amounts of discharged fuel of the fuel pumps can be supplied from the common discharge passage, a common pressure regulator (25) is connected to the common discharge passage (24), and the entire structure is formed as a unit, thereby obtaining an inexpensive pump unit (5) having a high output.