Method for transmitting sms during ptt call service in mobile communication terminal

The present invention relates to a message transmission method of the PTT (Push To Talk) call in a mobile communication terminal, including a PTT during the process of checking whether during message transmission key is input, a call and enter the message transfer key, a plurality of messages previously set when any of the processes and the message display a screen to be selected, with the selected message, the process of writing an SMS message by sending a pre-set the participant and, when the write messages directly is selected, send a message receiving selection of the other party, it receives the input messages, and includes the step of having the input transmitted message to create an SMS message to the selected opponent. This invention has the advantage that even if no control over can inform their status to the call participants. POC, PTT, one-way calls, emergency messages, SMS