An electrical connector includes a first connector including a first interlock terminal, a first connecting terminal, and a first interlock connector for holding the first interlock terminal, and a second connector including a second interlock terminal electrically connected to the first interlock terminal, and a second connecting terminal engaged with the first connecting terminal. The second connector further includes a second interlock connector engaged with the first interlock connector and holding the second interlock terminal, a fit detecting portion movable in conjunction with the second interlock connector for detecting a fit state of the first connector and the second connector, and a rod for connecting the second interlock connector to the fit detecting portion. The second interlock connector includes an interlock female connector including a U-shaped portion substantially U-shaped in a side cross sectional view.