A switch apparatus for an automobile, comprising: a main body which has an open lower side; a cover body which is inserted into the open lower side of the main body and is coupled to the main body; a dial switch apparatus which is installed on the main body and has an annular wheel knob rotatable with a virtual rotation axis disposed in a vertical direction as a rotation center; a touch type switch apparatus which is installed on the main body and has a capacitive touch pad configured to be touched by a user and pressed in an up-down direction, wherein the capacitive touch pad is disposed inside the wheel knob; a main PCB which is coupled to the cover body to be disposed in the main body and into which a switch signal is input from the dial switch apparatus and the touch type switch apparatus; and a case body which is coupled to the main body and has a hole, through which the wheel knob and the capacitive touch pad are exposed, on an upper side; characterized in that a first installation rib is formed to protrude from an upper surface of the main body, and an input unit insertion groove into which a lower portion of the dial switch apparatus and a lower portion of the touch type switch apparatus are inserted is formed inside the first installation rib, a first drain rib is formed to protrude downward from the main body, and a first drain hole extending downward from a bottom surface of the input unit insertion groove is formed inside the first drain rib, the main PCB includes a through hole through which the first drain rib passes, and a second drain rib is formed to protrude upward from the cover body, and a second drain hole into which the first drain rib is inserted is formed inside the second drain rib; and wherein the second drain rib supports a lower surface of the main PCB. a main body which has an open lower side; a cover body which is inserted into the open lower side of the main body and is coupled to the main body; a dial switch apparatus which is installed on the main body and has an annular wheel knob rotatable with a virtual rotation axis disposed in a vertical direction as a rotation center; a touch type switch apparatus which is installed on the main body and has a capacitive touch pad configured to be touched by a user and pressed in an up-down direction, wherein the capacitive touch pad is disposed inside the wheel knob; a main PCB which is coupled to the cover body to be disposed in the main body and into which a switch signal is input from the dial switch apparatus and the touch type switch apparatus; and a case body which is coupled to the main body and has a hole, through which the wheel knob and the capacitive touch pad are exposed, on an upper side; characterized in that a first installation rib is formed to protrude from an upper surface of the main body, and an input unit insertion groove into which a lower portion of the dial switch apparatus and a lower portion of the touch type switch apparatus are inserted is formed inside the first installation rib, a first drain rib is formed to protrude downward from the main body, and a first drain hole extending downward from a bottom surface of the input unit insertion groove is formed inside the first drain rib, the main PCB includes a through hole through which the first drain rib passes, and a second drain rib is formed to protrude upward from the cover body, and a second drain hole into which the first drain rib is inserted is formed inside the second drain rib; and wherein the second drain rib supports a lower surface of the main PCB.