Abstract: Disclosed are earplugs capable of providing a good feel when worn, buffering external impact, and blocking noise or controlling the volume of the noise coming in from the outside. The earplugs comprise: a main body having a small cross-sectional part and an extended part; and an ear pad, which is mounted on the outer circumferential surface of the small cross-sectional part, comes into contact with the inner circumferential surface of an ear canal when worn in an ear, and blocks the gap between the outer circumferential surface of the small cross-sectional part and the inner circumferential surface of the ear canal, the earplugs also comprising a flexible part, which is installed between the small cross-sectional part and the extended part and allows the adjustment of the position of the extended part with respect to the small cross-sectional part.