To provide a synthetic resin floor member obtained through extrusion molding, improved in absorbing performance of impact produced at an upper plate to prevent an injury when falling or a crack of the upper plate caused by impact when dropping an object.

The synthetic resin floor material obtained through extrusion molding and including ribs continuous in an extruding direction between the upper plate and a lower plate is characterized in that the length of a line extending in the center of a rib thickness direction from the upper plate side of the rib to the lower plate side is longer than the space between the upper plate and the lower plate.