An optical module assembly comprising: an optical module body in which an optical transceiver is built; an optical cable having a connection terminal; a first connector configured to be coupled to one side of the optical module body, in order to be connected to the optical transceiver in the optical module body; a second connector, in which an insertion hole for inserting the optical cable is formed, wherein the second connector is configured to be connected to the first connector in order to connect the optical cable to the optical transceiver connected to the first connector when the optical cable is inserted into the insertion hole; and a disconnection unit configured to be installed on the first connector and the second connector to release the connection between the first connector and the second connector in order to release the connection between the optical module body and the optical cable by rotation when the optical cable is inserted into the insertion hole, wherein the optical module assembly further comprises: an engaging member formed on the optical cable; a coupling-engaging groove formed in the first connector, into which the engaging member is configured to be inserted; and a release-engaging groove formed in the second connector, into which the engaging member is configured to be inserted, wherein the engaging member of the optical cable is inserted into the coupling-engaging groove of the first connector when the first connector is connected to the second connector, and is inserted into the release-engaging groove of the second connector when the first connector is disconnected from the second connector. an optical module body in which an optical transceiver is built; an optical cable having a connection terminal; a first connector configured to be coupled to one side of the optical module body, in order to be connected to the optical transceiver in the optical module body; a second connector, in which an insertion hole for inserting the optical cable is formed, wherein the second connector is configured to be connected to the first connector in order to connect the optical cable to the optical transceiver connected to the first connector when the optical cable is inserted into the insertion hole; and a disconnection unit configured to be installed on the first connector and the second connector to release the connection between the first connector and the second connector in order to release the connection between the optical module body and the optical cable by rotation when the optical cable is inserted into the insertion hole, wherein the optical module assembly further comprises: an engaging member formed on the optical cable; a coupling-engaging groove formed in the first connector, into which the engaging member is configured to be inserted; and a release-engaging groove formed in the second connector, into which the engaging member is configured to be inserted, wherein the engaging member of the optical cable is inserted into the coupling-engaging groove of the first connector when the first connector is connected to the second connector, and is inserted into the release-engaging groove of the second connector when the first connector is disconnected from the second connector. an engaging member formed on the optical cable; a coupling-engaging groove formed in the first connector, into which the engaging member is configured to be inserted; and a release-engaging groove formed in the second connector, into which the engaging member is configured to be inserted, wherein the engaging member of the optical cable is inserted into the coupling-engaging groove of the first connector when the first connector is connected to the second connector, and is inserted into the release-engaging groove of the second connector when the first connector is disconnected from the second connector.