Pre-sowing laser biostimulation of seeds of cultivated plants to its results in crops of cultivated plants is arising great interest among practicioners. Results of many years' studies carried out in Universisty of Agriculture confirm the effect of using the laser biostimulation reported both in Polish and foreign literature. Studies carried out in Universisty of Agriculture in Lublin made it possible to elaborate our own technology of making laser biostimulation of seeds of selected cultivated plants. Within the framework of these studies a machine for laser biostimulation of seeds bas been constructed. Pre-sowing laser biostimulation of seeds of some studied plants resulted in the following increase of crops: maize- from 10 to 20%, spring wheat - from 20 to 30%, spring barley - from 20 to 25%, sugar beets - from 10 to 35%. Better plant seedlings, higher resistance to cold and earlier plant maturation are the additional effects of using the pre-sowing laser biostimulation of plants. In the case of com the vegetation period is shortened by about 10 days. The quality of plants grown from the seeds which underwent the laser biostimulation is a1so higher, for example in the case of laser spring wheat the protein content increased by about 2%, in laser sugar beets the amount of sugar increased from 15% to 17%. Initial studies proved that it possible to diminish nitrogen fertilization when applying laser biostimulation of seeds without essential decrease in crops.