An engagement mechanism of a hanging sliding door including a roller for rolling along a lower track; a connector for connecting the engagement mechanism to the respective sliding door, where the connector includes a supporting portion and an extended portion allowing holding the roller at a predefined distance from the respective sliding door; and an elastic member such as a spring connected to the roller in a manner that allows the roller to move along an axis of the elastic member that is substantially perpendicular to the sliding door tracks. The extended portion includes a holding member for holding the elastic member there-above in a manner that allows the elastic member to apply force from below the roller towards the lower track located above the roller for maintaining engagement between the roller and the lower track throughout the sliding movement thereof.