Abstract: A universal serial bus connector including a male and a female connector. The male connector has elastic hooking means fixed to two sides of its casing. The hooking means each has a front hook and an outward projected elastic rear push portion. The female connector has outward extended retaining tabs provided at two edges of its each insertion hole corresponding to the hooks of the hooking means on the male connector. When the male connector is inserted into the female connector with the rear push portions of the hooking means inward pressed, the hooks may be located beyond the retaining tabs on the female connector. When the push portions of the hooking means are released, the hooks of the hooking means elastically shift inward to engage with said retaining tabs and cause the male connector to be firmly connected to the female connector without easily disengaging from the latter.