Disclosed is a communication terminal transmitting and receiving audio data and at least one of image data obtained by imaging a subject and display data of a shared screen between the communication terminal and one or more other communication terminals via a relay device. The communication terminal includes a detector configured to detect a predetermined event in which transmission of the image data is not required while imaging the subject is continuously executed, and a stopper configured to stop imaging the subject and stop transmitting the image data in response to the detection of the predetermined event.