Research was conducted on Peking duck eggs from the reserve flock 44. Egg quality evaluation was carried out in the 28th, 36th and 44th week of ducks life, in other words in the 5th, 13th and 21 sh reproduction week. At each date 30 eggs were evaluated, 90 eggs intotal, al-ways 24 hours from laying. With the ducks age the following values have increased: egg weight (from 77.8 to 86.8 g), egg length (from 63.5 to 64.8 mm), egg width (from 46.4 to 48.9 mm) and the shell surface (from 86.3 to 92.8 cm²). The egg shape became slightly rounder and its shell colour dark-ened. Egg albumen content has decreased from 60.4 to 57.1%, while yolk content has increased - from 29.7 to 33.1%. Both the quality of thick albumen, determined by Haugh units, and the quality of yolk, described by its diameter, have deteriorated.

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