A commodity display unit comprises (10): a frontal advancing rail frame (1) comprising lots of rollers (11) mounted on the rail frame in the form of descending frontward and a side panel (15) formed in the middle portion of the rail frame for guiding the commodities (53); a commodity fall-down preventing section (2) to be installed in the front section of a commodity display shelf; and a pitch-fixing plate (3) for positioning the frontal advancing rail frame (1); wherein a distance between the side panels (15) suitable for the width size of the commodity to be displayed can be set without restraint by selecting a pitch of the pitch fixing plate (3) along with combining the two or more rail frames (11) with one another; and wherein the display unit is easy in inventory management, readily changeable in design conformably to the size or the like of the commodity to be displayed, and capable of thinning out the rotating rollers to resultantly become adjustable and inexpensive.