To securely prevent furniture etc. from moving when an earthquake etc. happens by placing the furniture etc. on a body and butting side parts of the furniture etc. against wall parts, and by regulating displacement of the wall parts by a core material.

A resin sheet is composed of a flexible resin and provided with the sheet-like body 3 having friction engaging parts 11 and 13 on a front and a back faces, and the wall parts 5 and 7 provided on the body 3 in a standing manner. The core material 9 is provided for regulating displacement of the wall parts 5 and 7. The wall parts 5 and 7 butt against the furniture etc. , and displacement of the wall warts 5 and 7 is regulated by the core material so as to prevent the furniture etc. from slipping with respect to the body 3 and to securely prevent it from moving horizontally.