Abstract: The present invention discloses an optical module which includes a circuit board, a wire end connector, a board end connector and a sealing cover. The board end connector has a reflective interface and is fixed on the circuit board. The wire end connector is connected with the board end connector. The sealing cover is disposed over the circuit board and covers at least a portion of the board end connector and at least a portion of the wire end connector. The reflective interface on the board end connector is completely accommodated in the sealing cover. End faces of the sealing cover are sealed. The disclosed optical module is easily sealed, requires a small amount of sealant and is reworkable.