To provide a holder for a work conveying device, which has a high degree of freedom in installation of an attachment and can be reduced in weight, and to which the attachment can be selectively and detachably connected.

In the holder for a work conveying device, which is installed to the work conveying device of a press machine and allows the attachment 2 having a vacuum suction cup 53 to be detachably connected thereto, the holder for the work conveying device includes a holder body 1 and an engaging mechanism 3. The holder body 1 is substantially cubic, and has two circular through-holes H orthogonal to each other in the axial center.