The invention discloses an integrated faucet soap dispenser. The soap dispenser is arranged on a faucet and at least comprises a housing, a pressing cap, a pressure spring and a piston one-way valve assembly, wherein the piston one-way valve assembly is arranged in the housing and comprises a valve cylinder and a valve core; the valve core is arranged in the valve cylinder in a sliding manner; a one-way valve I is arranged on the bottom surface of the valve cylinder and a liquid soap inlet of the one-way valve I communicates with a liquid soap container through a pipe; the valve core is provided with a through hole I which axially penetrates through the valve core; a one-way valve II is arranged in the through hole I; the pressing cap is arranged at the top of the housing through the pressure spring and is connected with the top of the valve core. The faucet and the soap dispenser are combined and can be arranged in a faucet hole in a water channel at the same time, and a soap dispenser hole does not need to be additionally formed, so that the using space is saved; a plurality of one-way valves are adopted by the soap dispenser and a sinking one-way valve, so that the liquid soap does not flow back and fills the soap dispenser and the pipe, the soap dispenser is more convenient and faster to use, and the liquid soap is discharged through one press.