Elastic band for use with eyeglasses

An elastic band includes a fastening band, and a protective member; the fastening band is elastic, and includes a band body, and two connecting sleeve parts, which are joined to two ends of the band body, and intended for connection with temples of a pair of eyeglasses; the protective member is made of soft and water-absorbent material, and it covers the band body of the fastening band to reduce the wearer's discomfort caused by the fastening band; in use, the fastening band and the eyeglasses together are positioned around the wearer's head with a proper tightness such that the eyeglasses are firm without possibility of falling off accidentally even if the wearer is moving drastically; the protective member can be separated from the fastening band to be washed and replaced with a new one after it takes in much perspiration or becomes dirty.