Disclosed is a method for transmitting control information in a media access control-enhanced packet data unit (MAC-e PDU), including determining a data size of a transport format combination (TFC) selected by a user equipment (UE), including control information into the MAC-e PDU when a size of data and a header for the MAC-e PDU is shorter than the data size of the TFC, padding data of the MAC-e PDU with padding bits if a size of data including a corresponding header is shorter than the data size of the TFC, including the control information into the padding bits if the length of the padding bits is suitable for the transmission of the control information, and sending, by the UE, the MAC-e PDU including the control information to a node B.