A clasp device for accessories includes: a locking element provided with an locking hole or locking groove; and a clasp for the engagement with the locking element. The clasp comprises: a receiving member into which the locking element is inserted; a stopper member comprising a U-shaped plate and a push button and having an open space for receiving the receiving member; a coil spring for urging the inner lower end of the U-shaped plate into the inner region of the receiving member; and a positioning casing and a cover lid forming a clasp body. The receiving member is provided with an engaging opening through which the inner lower end of the U-shaped plate protrudes into the inner region of the receiving member. The push button of the stopper member is in the form of a hollow cylinder accommodating therein the coil spring. The stopper member is urged upwardly by the resilient action of the coil spring, thereby the inner lower end of the U-shaped plate is urged inwardly into the inner region of the receiving member. The clasp body is provided with an insertion hole communicating with the receiving member, allowing inserting and pulling out operations of the locking element.