Abstract: This invention relates to a litter bag for automobiles and in particular to one including a body portion provided at the lower portion with a pocket and on the outer surface with a zipper through which a roll of plastic bags may be disposed therein. The top of the pocket has an elongated slit through which the plastic bag may be conveniently drawn out for use. The bottom of the body portion has a strap designed to fix the body portion under a seat. The upper edges of the body portion has a resilient member in the interior for keeping the mouth of the plastic bag closed normally and a male connector on both ends. The body portion is further provided on both sides with a side flap having on both ends a female connector engageable with the male connector.