Abstract: This construction machine according to the present disclosure comprises: a brake lamp which is installed at both ends at the rear of a swing body and turned on in response to braking of a driving body; an auxiliary information display lamp installed long horizontally above the brake lamp at the rear of the swing body; an object detecting unit which detects objects around the construction machine; a swing motion detecting unit which detects the rotation of the swing body; and a control device which turns on or makes the auxiliary information display lamp blink in a pattern selected from among a plurality of differently set patterns on the basis of information received from the object detecting unit and the swing motion detecting unit, wherein the control device controls the auxiliary information display lamp to preferentially light up according to a brake signal.