A workpiece-attitude-discernment mechanism for a robot chuck, said mechanism discerning the attitude of a workpiece held by the robot chuck, and comprising: multiple assembly holes provided in a chuck part of a robot chuck that holds a workpiece via multiple chuck jaws; an airflow passage that supplies air to the assembly holes; multiple pushers that are respectively and independently inserted into the assembly holes such that the pushers are capable of moving in the pressing direction of the workpiece, and that are independently switched, according to the extent of the pressing by the workpiece, between a state in which the air is released to the atmosphere, and a state in which the air is isolated from the atmosphere; and an air-pressure-detection unit that detects the pressure of the air within the airflow passage.
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