Head-up Display Apparatus

A head-up display (HUD) apparatus includes a housing including a lower case that is open at a top thereof and defines an internal space, and an upper case that corresponds to the lower case to cover the top of the lower case; a first connector forming a female structure configured to be coupled to a male connector inserted into the housing through a male-female coupling method; a cable extending from the first connector and configured to be connected to an external device; and a cable guide configured to surround at least a portion of the cable and to guide the cable to maintain a constant curvature.