In different planting designs of parent lines for hybrid seed production, pollen is provided by the fertility-restoring line. Apis rnellifoa L. is the most important insect in pollen transfer from the inflorescences of the male line to those of the female. In 1989-1991, in the Dobrudja region, Bulgaria, studies were conducted to determine the row spacing effect of the female line rows of Albena hybrid from the male line row on the density of Apis mellifera L. on the rows of the female line. The results of the investigation show that on an average day, when the density oflP6 mellilera is from 6 to 40 bees per 100 heads, there is no correlation between the traits studied, i.e., the row spacing between the sunflower self-potlinated line 2607 and the male line, in a planting design 5:1 ofhybrid seed production, does not affect the density of Apis mellilera L. on these rows.