A buckle-phone coupled with a belt, comprising: a mobile phone bent in the length direction of the belt to correspond to a user's waist size; a mobile phone support bent to correspond to the mobile phone and including a mobile phone accommodating section for attachably and detachably supporting the mobile phone the side of the mobile phone being coupled with the side of the belt; an earphone assembly electrically connected to the mobile phone installed in the mobile phone support, and including earphones, a microphone, and an earphone wire connected with the mobile phone support, the earphones, and the microphone; an earphone accommodating section provided at the mobile phone support and accommodating the earphone assembly; and a buckle provided at the other side of the mobile phone support and coupled with the other side of the belt so as to adjust the belt length to correspond to the user's waist size. As described above, the buckle-phone according to the present invention serves as a buckle and a mobile phone, easily keeps earphones, and easily adjusts the length of a belt to be suited to a user waist size.