To provide a flooring construction instrument capable of easily moving a flooring in a short time without much time and efforts just before laying the flooring by a wall or the like.

A flooring construction instrument comprises: a first abutment which is brought into abutment with a longitudinal surface by the wall or the like; a rod-like body extending from the first abutment; a housing which is movable relatively to the rod-like body; a stopper of which the tilted state with respect to the rod-like body is maintained by a coil spring or which is provided to be approximately vertical through cancel operation; a projection; a coil spring of which the approximately perpendicular state can be maintained by being combined with a lock opening or the coil spring and which gives forces in directions opposite to each other; a push-on piece which is tilted with respect to the rod-like body by being combined with a trigger piece or the projection and is slit forward by the coil spring or the trigger piece while being tilted and fixed with the rod-like body; and a second abutment, of which the cross section is L-shaped, brought into abutment with an upper surface and a longitudinal surface of a flooring.