Workpiece gripping device

A workpiece gripping device includes a gripping member and a holding member. The gripping member includes a pair of extension parts that protrude from a base part and face each other with a space therebetween where the plate-shaped part of the workpiece can be inserted, and is deformable so that at least parts of the extension parts approach each other or are separated from each other. The holding member includes a slit for holding the gripping member slidably along a direction in the extension parts protrude, can make the extension parts approach each other by housing at least parts of the extension parts in the slit, and can make the extension parts be separated from each other by projecting at least parts of the extension parts from the slit.