The present invention provides a connector interface comprising a connector socket interface and a connector plug interface, the connector socket interface comprising metal shell, insulator, band-shaped recess provided on said insulator and metal contacts and the connector plug interface comprising metal shell, insulator, and band-shaped protrusion provided on said insulator and metal contacts, said connector socket interface and said connector plug interface being able to be coupled together, wherein: said connector socket interface has a plurality of band-shaped recesses and said connector plug interface has a plurality of band-shaped protrusions. In a connector interface with the same number of metal pieces according to an embodiment of the present invention, the footprint of the coupling part is reduced, the footprint per pair of contacts is reduced, and the objective of increasing the pin density of the contacts in a connector is achieved.