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 11 interposed between the floor mat 6 and a carpet 2, the mat locking projection 13 swollen from an upper surface of the plate and engaging with the peripheral edge 8 of a locking hole by penetrating through the locking hole 7 of the floor mat, and a carpet locking projection 12 swollen from an under surface of the plate and engaging with the peripheral edge 4 of a locking hole by penetrating through the locking hole 3 of the carpet, and is constituted so that a locking member 81 rotating around a horizontal shaft is rotatably arranged in an upper part of the mat locking projection 13, and can be changed to a state of rotating the locking member in a first attitude of protruding in the radial direction more than a lower part of the mat locking projection and a state of rotating the locking member in a second attitude of not substantially protruding in the radial direction more than the lower part of the mat locking projection.