An earphone to fit with a plurality of audio cables with difference application lengths includes an earphone body and a first buckle structure. The earphone body further includes an audio jack to couple with an audio terminal of a relevant audio cable with an appropriate application length. The first buckle structure is located at the audio jack for providing a firm connection between the audio terminal and the audio jack. By providing the earphone body to engage firmly the audio cable with an appropriate application length in a separable manner, any application situation featuring a particular application length can be easily overcome.