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In this study we studied the conditions of trace elements deficiency in poultry. Some basic information on trace elements as well as the diseases that may arise from their lack in the various organisms, including birds, have been introduced. Following the work, the diseases observed in birds in the absence of manganese were presented and results of recent experiments on the use of manganese in poultry diet were reported. Iron and copper deficiency was then studied and recent results from the use of copper in poultry diet were reported. Then, there were analyzed diseases observed by the lack of iodine and magnesium in the birds and further analyzed some symptoms and causes of hypomagnesemic tetania. Then, conditions were analyzed that result from lack of sodium and chlorine potassium. The electrolyte balance of the bird organisms has also been analyzed. Then, the diseases resulting from the lack of selenium and zinc were reported, as well as recent results of experiments on the use of zinc in poultry diet. Here are some trace elements that can be added to the poultry diet in combination to cope with the lack of trace elements. Finally, the conclusions drawn from this paper are presented.