The rising interest in the ecological and energy-saving constructions include the whole life cycle of building – starting from materials and ending with remains that a building leaves in the environment. The holistic view of the ecological construction leads to increase in the interest in constructions made from straw. This article focuses on the technology using straw bales in modern buildings. To a great extent the straw bale method fulfils modern, ecological trends because of low production costs, low energy use during production and biodegradation, among others. The article describes physical parameters specific for straw bale and gives examples of current projects of modern buildings made with this technology.