To provide a liquid soap supply cock improving reliability by eliminating inferior delivery even if a dry state continues for a long period and eliminating the splash of liquid soap to clothes, and being smoothly and comfortably used by a user without feeling bewildered.

This liquid soap supply cock is provided with a tank storing the liquid soap, a pump for pressure-feeding the liquid soap, a controller for controlling the pump, a sensor sensing the approach of a delivery object and outputting an electric signal to the controller, an outlet for delivering the liquid soap, and a check valve disposed on the way to a channel communicating between the pump and the outlet. This liquid soap supply cock is characterized in that the pump is provided with a pump operation mode different from a preset rotation speed.