Disclosed is a switch device including a housing, a plurality of components (including a conductive member, a conducting member, a switch member and an actuating member) accommodated in the housing, and a lid body disposed on the housing. Two vertical boards are disposed on a bottom portion of the housing, and a receiving space is formed in a middle part of the bottom portion. The conductive member has an electrode that is disposed on an upper side in the receiving space adjacent to the two vertical boards. A plurality of grooves are disposed on the bottom portion outside the two vertical boards. The switch member is disposed in the receiving space. A contact pad corresponding to the electrode is disposed between a bottom portion of the switch member and the actuating member at a top portion of the switch member, and is linearly aligned with the actuating member.