The conditions of Polish primitive horses ' maintenance in some stables. In this paper 1 three stables for polish primitives horses were j analyzed allow of microclimate conditions. There were estimated following indicators: internal temperature, relative humidity, air velocity and intensity of light. The investigations were done during three periods: autumn, winter and spring. The studies shown that in examined buildings some parameters (especially temperature and level of light) were not compliant with polish standards. But on the other side on these farms there were no serious problems with health of animals. It is very supposedly that it is connected with breed and the type of management. In these stables there were kept primitive horses, resistant to untoward weather's conditions. Additionally significant part of day the horses were kept outside so the influence of building was lower.