A foot switch for driving a lever-type flush valve of a toilet bowl includes a lever operating part mounted on a flush valve of a toilet bowl to rotate a lever of the flush valve, a driving cable of which one end is connected to the lever operating part and the other end is connected to a foot stepper, and a foot stepper configured to pull the driving cable by being pressed by a foot of a user, wherein the lever operating part includes a first frame fixed to the flush valve and a second frame configured to be supported to be rotatable relative to the first frame as the driving cable is pulled.