1. An earphone defining a first end configured to be inserted into an ear canal of a user and a second end opposite to the first end configured to abut a cavum conchae of the user, the earphone comprising:a housing having a sound output hole formed at the first end of the earphone;
a drive unit received inside the housing; and
a resilient element disposed between the first end and the second end;
wherein the housing comprises a sound amplification portion, the resilient element is sleeved on the sound amplification portion with a space formed therebetween such that the resilient element is capable of being squeezed and deformed to thereby cause the first and second ends of the earphone to be squeezed toward each other, which allows the earphone to be suitable for cavum conchae with different sizes.