The present invention relates to a connector, wherein a connector is defined with an opening for connecting a USB connector. The connector is mainly assembled from a hollow casing, a first base and a second base, and two rear side walls of the hollow casing are respectively formed with a position fixing portion extending away from the opening. Moreover, after fixedly combining together the first base and the second base, two sides thereof are respectively formed with a guiding portion, which enable fixing portions extending from two sides of a printed circuit tongue to effect sliding inserted disposition. After assembly of the bases with the printed circuit tongue, then the fixing portions enable fastening to the position fixing portions. Accordingly, the bases not only enable achieving the objective of product customization, but also retaining positioning of the connector is enabled to prevent errors from occurring due to displacement.