The invention relates to a connection arrangement for a trailer vehicle and to a trailer vehicle. The connection arrangement (1a, 1b, 1c, 1d) according to the invention for a trailer vehicle (14a, 14b, 14c) comprises at least two connections (2, 3, 4, 5) of the following connections (2, 3, 4, 5) suitable for connecting on the tractor side: a) a first electrical connection (2) for a brake system (25); b) a second electrical connection (3) for a lighting system, c) a first pneumatic connection (4) for a brake line, d) a second pneumatic connection (5) for a reservoir line, and at least two lines (9, 10) for connecting one connection (2, 3, 4, 5) each to a trailer-side component, wherein the at least two lines (9, 10) are consolidated into a common cable harness (22) at least in sections.