An electrical line arrangement for a vehicle including a dimensionally stable flat conductor rail and a contact part housing fitted on the flat conductor rail such that it at least partially engages around the flat conductor rail. A contact part which makes contact with the flat conductor rail can be accommodated or is accommodated in the contact part housing. The line arrangement includes a mounting rail having a mounting flange for connection to the vehicle and a first connecting flange through which the contact part housing is held on the mounting rail in an interlocking manner in such a way that enables movement in a translatory manner along the mounting rail.