A cushion material for packaging a product is capable of absorbing shocks and impacts and being used for various types of product in a multipurpose manner. A load detecting portion 1 detects a load of an object to be weighed 12, a processing portion 2 converts a detecting signal from the load detecting portion 1 into a mass value, transmits the mass data to a display portion 3, and controls a sensitivity calibrating mechanism 6a to perform a sensitivity calibration by increasing or reducing internal weights 13 on the load detecting portion 1. The access line may be electrically coupled with one or more of the transistors and may be operably coupled to a voltage source.