Technical Abstract: International Bull Evaluation Service Holstein evaluations from May 2005 were examined for country bias by comparing full-brother families. Countries with more than 25 bulls in multi-country, full-brother families were included. The model fit evaluation on the US scale by absorbing full-brother family, and producing solutions for country of most daughters relative to US bulls. Over 20,000 bulls were included in the analysis. The experiment was repeated fitting evaluations on the scales of nine countries other than the US. On all country¿s scales, bulls from Australia, Germany, Great Britain, and Japan had an advantage in EBV milk over full brothers from the US and Italy. Bulls from Australia, Great Britain, and South Africa had an advantage in EBV fat. For EBV protein, bulls from Germany, Great Britain, Japan, and South Africa had an advantage, while bulls from The Netherlands were disadvantaged. For SCS, US bulls were advantaged only compared to bulls from South Africa. Significance of biases was similar across country scales of the Interbull evaluations. Cause of biases is unknown; perhaps bias in evaluations of local vs. foreign bulls are present in the national evaluations submitted to Interbull and are propagated throughout national scales in the Interbull results.