To easily remove a floor mat by producing a state where a locking hole relatively easily slips out of a mat locking projection, when cleaning a floor and the floor mat.

This floor mat clip includes a plate interposed between the floor mat and a carpet, a mat locking projection swollen from an upper surface of the plate and engaging with the peripheral edge of a locking hole by penetrating through the locking hole of the floor mat, and a carpet locking projection swollen from an under surface of the plate and engaging with the peripheral edge of the locking hole by penetrating through the locking hole of the carpet. The floor mat clip is characterized by being constituted so as to change the mat locking projection to a state of relatively hardly slipping out the locking hole of the floor mat and a state of relatively easily slipping out the locking hole of the floor mat.