A vehicular seat-to-hump gap filler device is inserted between a vehicular seat and hump for filling the gap between the seat and hump. The vehicular seat-to-hump gap filler device includes lower and upper pocket constructions. The lower pocket construction includes a hemi-ellipsoidal outer surface, a hemi-ellipsoidal inner surface, and an upper rim. The outer surface is sized and shaped for insertion between a vehicular seat and hump. The inner surface receives a portion of the upper pocket construction. The upper pocket construction includes an upper flange section and at least one semi-ellipsoidal cavity construction extending from the upper flange section. Each cavity construction is received in adjacency to the inner surface of the lower pocket construction and defines an upper matter-receiving pocket. The upper flange section is seatable upon the upper rim, and each matter-receiving pocket receives and collects matter for enabling a user to retrieve received matter as collected.