Abstract: A combination USB connector includes an electrical insulating terminal holder including a holder body and a front extension, a conducting terminal set including conducting terminals, signal terminals and transmission terminals and respectively mounted in the holder body and front extension of the electrical insulating terminal holder, an EMI shielding shell including a main shell part surrounding the holder body to constitute a USB (USB3.0 or 2.0) connector, a sub shell part surrounding the front extension to constitute a micro USB connector and a mount connected between the main shell part and the sub shell part, and a swivel adapter including a terminal holder pivoted to the mount of the EMI shielding shell, adapter terminals mounted in the terminal holder and a metal shielding casing surrounding the terminal holder to constitute a USB2.0 connector.