Abstract: A new motor vehicle trash bag for storing garbage that has accumulated in a vehicle. The inventive device includes an interior frame member having a generally V-shaped cross-section. The interior frame member has an inverted generally U-shaped inner member. The inner member has a spring member disposed thereon. The interior frame member has an inverted generally U-shaped outer member. The outer member is secured to the spring member whereby the spring member biases the outer member outwardly with respect to the inner member. The inner member and the outer member each have a pair of clips disposed thereon. The pair of clips are adapted for holding a garbage liner therebetween in an open orientation. An exterior portion is dimensioned for receiving the interior frame member therein. The exterior portion is dimensioned for positioning beneath a seat of a vehicle.