Fuel pump unit

To reduce manufacturing cost of a fuel pump unit apparatus, a collar portion (1a), an insertion tube portion (1b) protruding upward from the collar portion (1a) and an external fuel discharge path (1c) are formed in a closing member (1), an internal fuel discharge path (2c) is provided in a holder member (2), and a regulator fuel insertion hole (2d) and a pump discharge path insertion hole (2b) are open toward the internal fuel discharge path (2c), the closing member (1) and the holder member (2) are screwed with each other, whereby a support member (3) is formed, a fuel pump (P) with a strainer (S) is pinched by the closing member (1) and the holder member (2), a pressure regulator (R) is attached to the holder member (2), and the internal fuel discharge path (2c) is connected to the external fuel discharge path (1c).