Patent ID: 7298156

Claim:
An electronic device testing apparatus comprising a first contact arm for holding the electronic device to be tested and bringing the electronic device to be tested to contact a contact portion of a test head, and a moving means provided on a base side for moving said first contact arm, including: a first image pickup means for taking an image of the electronic device to be tested in a state of being held by said first contact arm; an image processing means for recognizing a relative position of the electronic device to be tested held by said first contact arm with respect to said contact portion based on image information taken by said first image pickup means; and a contact arm position correction means for correcting the position of said first contact arm holding said electronic device to be tested based on the relative position of the electronic device to be tested with respect to said contact portion recognized by said image processing means, wherein said first contact arm comprises: a holding side contact arm for holding said electronic device to be tested, a fixing side contact arm fixed to said moving means and a lock-and-free means for restricting or non-restricting a movement of said holding side contact arm relative to said fixing side contact arm, said contact arm position correction means is provided on said base side and moves said holding side contact arm relative to said fixing side contact arm.