Process procedure defines the following: the scheme of production of the improved planting stock of pear clonal stocks forms; the laboratory equipment and the work organisation; parental plants selection and testing for viruses presence; parental plants clearing from pathogens by in vitro culture method; the accelerated propagation (introduction in culture in vitro, nutritional media, micro propagation, rootage of micro shoots, acclimatisation of plants in tubes in unsterile conditions); primary plants content and reproduction in vitro and in a sheltered ground; plants protection from reinfection. Applying of the developed process procedure allows to receive the improved planting clonal pear stock characterizing by high quality and corresponding to modern requirements, of a class "A" of a category super – super elite (SSE), super elite (SE), elite and 1st reproduction; and of a class "B" of a category elite and 1st reproduction.