Agriculture is an important sector of the economy. In order to produce food takes a lot of processes using dedicated machines. One such machine is the plough. Its construction has changed over the centuries. Many research centers and companies conduct continuing studies to improve the construction of ploughs. It is important to reduce the cost of fuel during plowing .One of the important parts of the plow is a mould board. Its shape and tribological properties have a great influence on the work of the plough. In this paper the influence of pressure directed at the working surfaces of the plough body to the stresses inside the structure was analyzed. The analysis was performed using Finite Element Analysis (FEA) in Auto Desk Inventor Professional 2015. FEA analysis allows pre-testing of the properties of the part before manufacturing. Creating model and adding forces and pressures to it allows for huge savings for companies. It is possible to find weaknesses in designed products before they cause problems