In the recent decade in Poland the number of honeybee hives decreased from 2.2 million to some 0.8 million. Despite efforts to improve the situation, this number is not likely to improve in near future. Consequently, it can be expected that breeding other valuable Polish bee species which are equally efficient in pollinating as the honeybee. The studies on loner bees have been gaining momentum and their significance is increasing. The authors indicate the importance of these bees as an element of intensification of agricultural and horticultural production, the most common bee species are also presented.