Abstract: In a probe card, a plurality of holes are provided in a performance board and a probe needle is inserted through the hole and movable via the performance board in an up/down motion without being secured to the performnce board. A spring is held in place around the probe needle. A securing board is located relative to the performance board and a plurality of pistons each has an end which is projected via the securing board and are provided on the securing board to allow the corresponding probe needle to push. Upon the operation of the air cylinder in a position corresponding to the pad of the chip to be tested, the corresponding probe needle is selectively pushed, by the projecting end of the piston, into contact with the pad of any detected chip to start the measurement of the chip. When the air cylinder is not operated, the corresponding probe needle is pushed up, by the spring, away from the chip.