To provide a terminal block that can respond to a change of a circuit when desired, without exchanging the entire terminal block.

Connection bars 25, 25... for electrically connecting a current limiter and a trunk breaker 71 are held on a holding stage 26 detachable with respect to a terminal block body 2, and are separately formed from the terminal block body 2 as a connection unit 3. Changes from a bypass terminal block 1A to a direct-connection terminal block 1B and from the direct-connection terminal block 1B to the bypass terminal block 1A can be achieved only by detaching and attaching the connection unit 3, and replacing a terminal metal fitting. Accordingly, it is not necessary to replace the entire terminal block each time, thereby facilitating the replacing work furthermore.