Door module for a vehicle

The invention relates to a door module (10) comprising a detachable panel (13) and adapted to wire a door harness (20). The detachable panel (13) is adapted to fit into a recessed portion (12) formed in a door inner panel (11) of a vehicle, and the door harness (20) comprises a trunk wire harness portion (20-1) and at least two branched wire harness portions (20-2, 20-3) connected to the trunk wire harness portion (20-1) and extending along branching directions from a branching point (P1). The detachable panel (13) is integrally provided with at least two projections (21, 22) each having rectangular faces that can hold the branching point (P1) of the door harness (20). These projections (21, 22) are arranged to define a gap which has substantially the same size as the diameter of the trunk wire harness portion (20-1), so that the gap can grip the trunk wire harness portion (20-1), when it is mounted, from both sides thereof near the branching point (P1), while the rectangular faces extend along the branched wire harnesses (20-2, 20-3) and guide them in the branching directions.