Abstract: Relates to collapsible grocery bag holders for installation in automobile trunk compartments. Different forms of the invention are illustrated and described herein. In general, they are composed of longitudinally extending side wall members pivotally mounted for folding into a flat compact unit, crossing dividers so designed as to grip the opposing side walls and firmly hold them in spaced apart vertical relationship to form a group of upward opening grocery bag compartments, living hinges for both side wall panels and dividers, and base or bottom members for underlying the grocery bag compartments which are provided with unbroken ridges extending around the perimeter of the base members to prevent escape of liquid or comminuted material from broken grocery packages beyond the confines of the base members.