PURPOSE: To eliminate the irregularity due to a measuring condition by automating measurement, by determining the position of electromagnetic wave shield molded product at a measuring position and measuring and recording the surface resistance between electrodes while allowing an electrode unit having a pair of measuring electrodes to advance to and retract from the measuring position.

CONSTITUTION: A electromagnetic wave shield molded product 3 is settable to a measuring position by the movable bed 4 on an operation board 1 and three sets of electromagnetic units 8 are attached to the support member 7 provided to the leading end of the piston of the main cylinder 6 fixed to the support 5 on said board 1 by an electromagnetic chuck 8a while a sub-cylinder 8c enabling the falling an opposed electrode 8b is attached to the chuck 8a by a position adjusting member 8d to constituted a unit 8. Further, measuring electrodes are fixed to an insulating base board at constant intervals to constitute the electrode 8b and brought into contact with the surface of the molded product 3 at the measuring position by the cylinders 6, 8c and the surface resistance value thereof is measured and recorded.