Abstract: The present invention provides an automatic foam soap dispenser used for single soap reservoir which is pressed from top to down. The automatic foam soap dispenser includes a covering housing opened downwardly for accommodating a pressing-typed soap reservoir, a control circuit board, a motor, and a sensor. The soap reservoir has a pressing head at the top thereof, the pressing head is communicated with a connecting head, and the connecting head has an extension pipe to communicate with a foam nozzle, which is mounted at the bottom of the covering housing. Moreover, an extension fixing board is extended inside the covering housing for mounting a transmission gear set, which is driven by the motor to turn, and a swinging pressing board, wherein the transmission gear set has a cam, and a first end of the swinging pressing board is pivotally connected to the cam and the transmission gear set, and a second end of the swinging pressing board is leaned on the pressing head or the connecting head.