A plurality of terminal chambers (20a) to (20e) is formed in a housing (16) by using a plurality of partition walls (24a) to (24e) to partition. In the terminal chambers, fixed contactors (31) each having a fixed contact point (31d) and a terminal screw (31a) are mounted. Engaged portions (31b) are formed integrally with the fixed contactors. Further, a press-fit engaging portion (26) is provided in each of the terminal chambers. The terminal chamber is formed as a space different from a space accommodating a movable contact point support, and the press-fit engaging portion is engaged by the engaged portion by press-fitting.