Mobile terminal and controlling method thereof

A mobile terminal and controlling method thereof are disclosed, by which a message can be sent in a manner that necessary information is contained in the message according to a configuration of the mobile terminal, a data volume of the message, a recipient of the message and/or the like. The present invention includes a wireless communication unit configured to send a message stipulated to limit a data space to which data can be inputted by a user, a display unit configured to display the message, a memory configured to store at least two user informations previously set, a user input unit configured to input the message, and a control unit controlling one of the at least two user informations to be selected according to a size of an empty space of the data space in sending the message after completion of writing the message, the control unit controlling the selected user information to be sent by being contained in the data space of the message.