To provide a crossbar supporting device of a workpiece conveying device which is applicable to a workpiece conveying device located between a plurality of press devices and carrying a workpiece, and can suppress the deflection and the vibration without increasing the overall height including a crossbar and a crossbar holding unit.

The crossbar supporting device of the workpiece conveying device locates between a plurality of press devices and carries in/out the workpiece to/from the press devices. The crossbar supporting device comprises: a crossbar 13 for mounting a plurality of workpiece holding units for holding the workpiece; and a pair of crossbar holding units 16 which hold the crossbar and connect it to a driving mechanism of the workpiece conveying device. The crossbar 13 is a horizontal bar-shaped member with its length being set to the value necessary for mounting the workpiece holding unit, and the crossbar holding units 16 are located at the parts in a vicinity of a supporting point at which the maximum deflection of the crossbar is minimum.