A pump liquid chamber (9) is formed inside a pump bellows (7). A suction
port (18) and a discharge port (19) are formed in a wall face (4a) facing
the liquid chamber (9). The suction port (18) communicates with a pump
inflow passage (5), and the discharge port (19) communicates with a pump
outflow passage (6). A suction check valve (20) is disposed in the
suction port (18). An accumulator liquid chamber (31) is formed inside an
accumulator bellows (29). An inflow port (23) and an outflow port (24)
are formed in a wall face (28a) facing the liquid chamber (31). The
inflow port (23) communicates with an accumulator inflow passage (33),
and the outflow port (24) communicates with an accumulator outflow
passage (34). The accumulator inflow passage (33) is connected to the
downstream of the pump outflow passage (6). A discharge check valve (21)
of the pump (P) is disposed in the accumulator inflow passage (33) in an
accumulator body (25).