In a pedestrian accident, the loading direction to the pedestrian thorax is affected by the posture of the pedestrian upon impact and a subsequent rotation of the upper body. For this reason, in order to predict pedestrian thoracic fractures accurately, injury criteria for the thoracic deflection formulated in one single loading direction (frontal or lateral) are not sufficient and evaluation of thoracic fractures due to loadings in different directions is required. This study investigated a technique for two-dimensional evaluation of thoracic deflection using human and dummy FE models and formulated injury probability functions for the thorax of a pedestrian dummy.