Abstract: The filler device for placement between seats/consoles is a one-piece, rugged polymer body (10) having an elongate blade and a seat belt boss extending either rearward or laterally from the blade. The blade has an upper portion (12) of substantially uniform width throughout its length, and a wedge-shaped lower portion (13) adapted for insertion between the automobile seat cushion and a console (C). The seat belt boss has a greater width than the blade and defines an opening (20) through which the buckle receiver (B) of a seat belt may be inserted to retain the filler wedged in place. In alternative embodiments, the filler (10) may have a cell phone holder or a cup holder extending laterally from the front end of the blade.