A connector assembly comprises a connector and a mating connector. The connector is attachable with a connecting object having a sheet-like shape. The connecting object has a wiring layer, a conductive layer and an insulator. The wiring layer includes at least one trace. The trace has a first contact portion. The conductive layer has at least two second contact portions. The connector is mateable with the mating connector along a first direction. The mating connector comprises at least one mating first terminal and at least two mating second terminals. Under a mated state where the connector in the attached state is mated with the mating connector, the first contact portion is positioned between two of the mating second terminals in a second direction perpendicular to the first direction. The second contact portions are brought into contact with the mating second terminals, respectively, under the mated state.