A service plug includes: a plug main body having terminals for engaging with the other terminals, the terminals electrically connected to each other; a pivoting shaft extending in a direction substantially orthogonal to a terminal engaging direction of the terminals of the plug main body and the other terminals; a lever connected to the plug main body so as to be pivotally movable through the pivoting shaft; and a pivot regulating mechanism arranged to extend over the lever and the plug main body, the pivot regulating preventing the pivoting of the lever relative to the plug main body with a predetermined force at least when the lever is substantially erected in the terminal engaging direction.