Abstract: A rack unit display system is provided to display goods, such as in a retail store, in a well structured and ordered manner. The goods are horizontally stacked in the rack unit. A theft protection member is provided which limits unauthorized access to the goods. The left protection member is adjustable in height to allow the display unit to accommodate different sized goods. The goods are pushed forward in the unit by a slide member where the units can then be removed from the rack in small quantities. The back unit is releasably mounted and secured by a lock mechanism on a base member, which in turn is mounted on a rectangular bar. The rack unit can be released from the base member by means of a key. The slide member can be locked in a rear end position of the display unit when the rack unit is removed from the base member. The unit can be filled or refilled with ease without interference from the slide member. The height of the theft protection member is also adjustable.