A blade preferably adopted to work machines for digging, carrying of soil and leveling, which achieves an increase in a quantity of soil per tractional force with a simple structure to reduce consumption horsepower and increase fuel consumption efficiency thereby leading to low cost, has a central front face section (12) having a linear first cutting edge (15) at a bottom end thereof, a jointed front face section (13) having a second cutting edge (16) which continues from the first cutting edge (15) and extends backward at a predetermined angle, and an end front face section (14) having a third cutting edge (17) which continues from the second cutting edge (16) and extended forward at a predetermined angle.