PURPOSE: To provide the congestion information display device on which congestion information can speedily and securely be viewed.

CONSTITUTION: When a congestion mode is selected with a mode select key 20, a display control unit 18 that the congestion information display device is equipped with refers to a table stored in a memory 17 once supplied with congestion information from a control unit 15, and then supplies an instruction for drawing respective roads in a thin color and congestion display marks in a thick color to a drawing device 19. The drawing device 19 draws the roads of the thin color and the congestion display marks of the thick color on a display device 16 according to the supplied drawing instruction. Consequently, the congestion display marks are emphasized.