The invention relates to a construction machine having a carrier unit, a boom mounted pivotably on the carrier unit, an erection support for erecting and/or holding the boom by means of a guy cable tensioned between the boom and the erection support, and a safety cable which can be tensioned along the boom for securing a user. A cable support with a first attachment point for the safety cable is arranged at a head end of the boom. A second attachment point for the safety cable is provided on the erection support. The safety cable can be tensioned between the first attachment point on the cable support and the second attachment point on the erection support along the boom.