A connector assembly includes a circuit board, a housing, terminals, a flexible circuit board and a reinforcement plate. The housing has a depression portion and is disposed on the circuit board. The depression portion has a first opening and a second opening adjacent to the first opening, and the terminals are disposed in the depression portion and electrically connected to the circuit board. The flexible circuit board has a first surface, a second surface and pads disposed on the first surface, and the reinforcement plate is disposed on the second surface near one end of the flexible circuit board, wherein when the flexible circuit board is joined to the housing and the first opening faces to the flexible circuit board, the pads contact the terminals, whereby the flexible circuit board is electrically connected to the circuit board, and the flexible circuit board extends from the housing via the second opening.