Patent ID: 7098680

Claim:
A connection unit for electrically connecting a DUT mounting board, on which an IC socket is mounted, with a testing apparatus for testing an electronic device inserted into said IC socket, said connection unit comprising: a holding substrate provided to face said DUT mounting board; and a connection-unit-side connector, which is provided on said holding substrate to be able to change a position of said connection-unit-side connector on said holding substrate, for connecting to a performance-board-side connector which said DUT mounting board comprises; wherein said holding substrate holds said connection-unit-side connector to be able to change said position in either a radial direction or an axial direction, in response to a position of said IC socket, where said connection unit and said DUT mounting board are connected, as a center; and wherein cross sections of said IC socket and said connection-unit-side connector are rectangular respectively at a surface substantially parallel to said holding substrate, and said holding substrate holds said connection-unit-side connector so that a longer side of said cross section of said connection-unit-side connector faces a nearest side of said cross section of said IC socket, in case said connection-unit-side connector is positioned most closely to said IC socket, with regard to a direction of diameter.