The connector body comprises: side portions to guide side surfaces of the inserted IC card; a bottom portion having a support surface to support a back surface or front surface of the IC card and stepped portions to engage a raised surface portion formed on the back surface so that the raised surface portion can be moved in an IC card insertion/retraction direction X when the back surface of the IC card is supported on the support surface; and a top plate portion to keep the IC card from floating upward. The top plate portion has: a restriction surface to keep the IC card from floating upward; and a receiving groove to movably receive the raised surface portion of the back surface in the IC card insertion/retraction direction when the back surface of the IC card faces the restriction surface.