A construction machine capable of suppressing deterioration in work efficiency includes an angle detecting device that detects a relative angle between a lower travelling body and an upper slewing body, a travel lever that can be manipulated to make the lower travelling body travel, a display, a directional information generating unit that generates information related to a travelling direction of the lower travelling body based on a detected result of the angle detecting device, and a display controller. The display controller causes the display to display an arrow image indicating the travelling direction of the lower travelling body generated by the directional information generating unit when the travel lever is manipulated and does not permit the display to display the arrow image when the travel lever is not manipulated.