The aim of this study is to determine the effect of reinsurance operations on the financial performance(ROA and ROE) of non- life insurance company in Egypt under the control variables by using the data of 9 non- life insurance company during the period from 2008 until 2016,reinsurance operation include (insurance and reinsurance debts ,the ratio of reinsurance, local reinsurance premium ceded to local reinsurance, foreign reinsurer premium ceded to foreign reinsurer , local claim coming from local reinsurer, foreign claim coming from foreign reinsurer ,the ratio of retention, the ratio of commotion, the ratio of insurance dependence)  and control variables include ( market share, size of the company age of the company and financial leverage ) by using penal data to determine the best model to predict the effect of reinsurance arrangement operations on financial performance .the study found significant and negative relationship between financial performance( ROA) insurance and reinsurance debt ,foreign reinsurer premium, the ratio of reinsurance, the ratio of retention ,size and financial leverage by the fixed effect model ,and significant and positive relationship between size and ROE ,and significant and negative relationship between age and ROE ,by the random effect model.