A portable terminal for transmitting printing data to a printing apparatus , the portable terminal comprising: a printing-data generating unit for generating the printing data; and a printing-data transmitting unit for transmitting the printing data to the printing apparatus ; characterized In that: the portable terminal further comprises a detecting unit (S) for detecting movement of a main body of the portable terminal , wherein in a printing instruction waiting state after the printing data generation, transmitting the printing data to the printing apparatus by the printing-data transmitting unit is triggered when a predetermined movement pattern of vibrating or shaking the main body is detected by the detecting unit (S), wherein: the portable terminal further comprises a printing-stop requesting unit for transmitting a printing stop command to the printing apparatus when the predetermined movement is detected by the detecting unit (S) within a predetermined time after the transmission of the printing data, the predetermined time is set according to the print data amount. a printing-data generating unit for generating the printing data; and a printing-data transmitting unit for transmitting the printing data to the printing apparatus ; characterized In that: the portable terminal further comprises a detecting unit (S) for detecting movement of a main body of the portable terminal , wherein in a printing instruction waiting state after the printing data generation, transmitting the printing data to the printing apparatus by the printing-data transmitting unit is triggered when a predetermined movement pattern of vibrating or shaking the main body is detected by the detecting unit (S), wherein: the portable terminal further comprises a printing-stop requesting unit for transmitting a printing stop command to the printing apparatus when the predetermined movement is detected by the detecting unit (S) within a predetermined time after the transmission of the printing data, the predetermined time is set according to the print data amount. the portable terminal further comprises a detecting unit (S) for detecting movement of a main body of the portable terminal , wherein in a printing instruction waiting state after the printing data generation, transmitting the printing data to the printing apparatus by the printing-data transmitting unit is triggered when a predetermined movement pattern of vibrating or shaking the main body is detected by the detecting unit (S), wherein: the portable terminal further comprises a printing-stop requesting unit for transmitting a printing stop command to the printing apparatus when the predetermined movement is detected by the detecting unit (S) within a predetermined time after the transmission of the printing data, the predetermined time is set according to the print data amount. the portable terminal further comprises a printing-stop requesting unit for transmitting a printing stop command to the printing apparatus when the predetermined movement is detected by the detecting unit (S) within a predetermined time after the transmission of the printing data, the predetermined time is set according to the print data amount. <EOS>