Purpose. Improvement of quality and productivity of potato peeling process by means of development and substantiation of new construction of spiral peeler taking into account reduction of losses and damages of potato tubers. Methods. Development of a new construction of a spiral cleaner is based on the application of basic principles of agricultural machinery construction, patent search and methods of calculation of basic construction parameters of the machine. Results. In the paper the authors developed a new construction of spiral potato peeler capable of active self-cleaning from sticky soil, effective removal of soil and plant impurities and qualitative cleaning of potato tubers with their minimal losses and damages. Presence of five wave-likely located working spirals has given the chance to expand considerably a working zone of separation of an arriving potato heap that promotes its better dispersal on a working surface of a cleaner, more intensive destruction of soil clods, and hence improvement of sifting of soil and vegetative impurity and reduction of clogging of working spirals that finally raises productivity and working capacity of a potato cleaner. The process of cleaning the tubers from soil and plant impurities is carried out due to the movement of the potato heap by means of the coils of the console fixed spiral springs rotating at a certain angular speed and the oscillatory movement of the springs themselves, arising due to the deflection of their longitudinal axes under the influence of the weight of the heap cleaner entering the working area. Soil and vegetable impurities are sieved through separating gaps and spiral coils, and potato tubers are transported by spiral coils towards the discharge conveyor. Conclusions 1. A new construction of the potato peeler has been developed, the main difference of which is five cantilever mounted cleaning spirals,arranged in waves at different heights, which allowed to expand the cleaning working area and improve the quality of cleaning potato tubers from soil impurities and plant residues. 2. The expediency of developing a new construction of the potato heap cleaner is confirmed by its efficient operation, high quality of cleaning of tubers from soil and plant impurities, ability of working bodies to self-clean from sticky soil, simplicity of construction and reliability in operation, increase of the cleaner's productivity. 3. Calculations of the required power for the drive of the new spiral cleaner have shown that it does not exceed 1.3 kW. 4. Preliminary calculations show that the use of the proposed spiral potato peeler cleaner will improve the quality of potato tubers cleaning from impurities by 15...20% in comparison with the triochspiral cleaner. Keywords: potato heap, tuber, impurities, purification spiral, coils, oscillatory motion, self-cleaning.