A construction machine includes a display control section which controls a display device to display attachment relevant information generated based on attachment positional information generated by an attachment positional information generation section and three-dimensional contour information of a peripheral working area around the construction machine. The attachment relevant information is information concerning an image obtained by superimposing a peripheral image about a three-dimensional contour of the peripheral working area and a projected image about a leading end attachment which is projected to the peripheral image in a projection direction set arbitrarily or a projection direction set in accordance with a predetermined condition.