A stacking connector comprises a main body and a plurality of connectors. The main body has a first containing slot and a second containing slot, the first containing slot arranges a connection module, and the second containing slot arranges a USB connector which has a detection function. The USB connector includes a body and a plurality of conductive terminals. The body has a tongue portion extended frontward from top side of the body. The tongue portion has a plurality of upper terminal slots, and each of the conductive terminals is set in a corresponding upper terminal slot. The body has at least one lower terminal slot at bottom side, and at least one detection terminal is set therein. When a male connector which can support high power transmission is inserted into the USB connector, the detection terminal is triggered, and the USB connector provides higher outputted power.