An object of the invention is to provide a blade preferable for being mounted on various kinds of work machines, particularly work machines for digging, carrying of soil and leveling, in which increase in a quantity of soil per tractional force is achieved with a simple structure to reduce consumption horsepower and increase fuel consumption efficiency thereby leading to low cost. A blade comprises a central front face section having a linear first cutting edge at a bottom end thereof, a jointed front face section having a second cutting edge which continues from the first cutting edge and extends backward at a predetermined angle, and an end front face section having a third cutting edge which continues from the second cutting edge and extended forward at a predetermined angle. The first cutting edge is protruded forward of the second and third cutting edges in their top view or intersection points of the second and third cutting edges are disposed backward relative to an extension of the first cutting edge. Preferably, width of the first cutting edge is set larger than internal width between right and left traveling units. Further, when the blade is in contact with the ground at an ordinary cutting angle, preferably, the entire blade is inclined backward with its sweepback angle of 15° or less.