An apparatus for controlling data transmission in a terminal, the apparatus comprising: a touch screen unit to generate a transmission gesture with a stylus; and a controller configured to: perform a control operation to transmit relevant data when the transmission gesture with the stylus is generated on the touch screen unit, wherein, a transmission type for transmission of the relevant data among a plurality of transmission types is matched to a transmission gesture type among a plurality of transmission gesture types, wherein the controller is further configured to: in response to switching of a message input mode, divide the touch screen unit into an input unit and a display unit, display character data inputted from the input unit on the display unit, in response to generation of transmission gesture on the display unit while the character data is displayed on the display unit, transmit a message including the character data displayed on the display unit, and in response to generation of transmission gesture on the input unit while the character data is displayed on the display unit, switch to file attachment mode. a touch screen unit to generate a transmission gesture with a stylus; and a controller configured to: perform a control operation to transmit relevant data when the transmission gesture with the stylus is generated on the touch screen unit, wherein, a transmission type for transmission of the relevant data among a plurality of transmission types is matched to a transmission gesture type among a plurality of transmission gesture types, wherein the controller is further configured to: in response to switching of a message input mode, divide the touch screen unit into an input unit and a display unit, display character data inputted from the input unit on the display unit, in response to generation of transmission gesture on the display unit while the character data is displayed on the display unit, transmit a message including the character data displayed on the display unit, and in response to generation of transmission gesture on the input unit while the character data is displayed on the display unit, switch to file attachment mode. perform a control operation to transmit relevant data when the transmission gesture with the stylus is generated on the touch screen unit, wherein, a transmission type for transmission of the relevant data among a plurality of transmission types is matched to a transmission gesture type among a plurality of transmission gesture types, wherein the controller is further configured to: in response to switching of a message input mode, divide the touch screen unit into an input unit and a display unit, display character data inputted from the input unit on the display unit, in response to generation of transmission gesture on the display unit while the character data is displayed on the display unit, transmit a message including the character data displayed on the display unit, and in response to generation of transmission gesture on the input unit while the character data is displayed on the display unit, switch to file attachment mode. in response to switching of a message input mode, divide the touch screen unit into an input unit and a display unit, display character data inputted from the input unit on the display unit, in response to generation of transmission gesture on the display unit while the character data is displayed on the display unit, transmit a message including the character data displayed on the display unit, and in response to generation of transmission gesture on the input unit while the character data is displayed on the display unit, switch to file attachment mode.