Transmission device for mobile telephone

The utility model relates to a transmission device for a mobile telephone, which is arranged in a battery clamping groove of a mobile telephone. The mobile telephone is provided with a battery protective cover which can be arranged on the battery clamping groove separately and a group of transmission port contacts exposed outside the groove bottom surface of the battery clamping groove. The transmission device for a mobile telephone comprises a substrate assembly which is arranged between the groove bottom surface of the battery clamping groove and a battery and can not influence the covering appearance original of the battery protective cover, and a transmission rowed wire electrically connected with the substrate assembly, and the substrate assembly comprises a plurality of pressure bars electrically connected with the equal transmission port contacts.