To reduce space occupied by part items as well as the number of electromechanical connections.

An integrated instrument cluster assembly for use on an instrument panel 400 has a first surface, a second surface opposed to the first surface, and a peripheral part 116 surrounding thereof. Further, the integrated instrument cluster assembly comprises a generally flat instrument cluster fittings, a generally flat light pipe/diffuser 120 sandwiched facing the second surface of the fitting, and at least one generally flat circuit board 130 sandwiched facing the light pipe/diffuser 120. At least one of the circuit boards 130 is arranged so that a first rigid end card connector 140 thereof protrudes outward substantially beyond the peripheral part 116.