<p>The quail chickens took feeding complex of glycine chelated microelements and microbial β-carotene during 90-day growing period. The inorganic compounds of copper, zinc, iron, manganese and cobalt were replaced by their glycine forms in a dose corresponding to the physiological daily norm in these elements.</p><p>We fixed increasing the thickness of shell eggs by 5.2 % compared with the control group, and by 11 % compared to quails, which took feeding complex of glycinate microelements and microbial β-carotene in a dose equal to half physiological norm.</p><p>Replacement of inorganic sources of microelements with their glycinate in doses of norm and half norm did not affect the weight of the eggs, yolks and shell of egg; nevertheless, the quail that treated of glycinate microelements in half norm doses, increased weight protein eggs by 3.3 % compared to quail, that feeding by glycinate microelements in norm dose.</p><p>Feeding of quail of glycinate microelements and microbial β-carotene in a half norm dose caused the egg shell thickness reduction by 5l6 % compared to the control group.</p><p>The introduction of glycinate microelements and microbial β-carotene in a daily norm dose contributed to the accumulation of dry matter in eggs by 3% due to the increase of organic matter, including 1.6 per cent of crude protein, 0.6 per cent of nitrogen free extract, and 0.17 per cent of ash.</p><p>We registered strong increase of nitrogen free extract in the eggs of Group II by 0.88 % compared to the control. </p>