Abstract: The influence of sound source directivity on binaural auralization quality is studied by using measured binaural room impulse responses (BRIRs) of directional sound source and omni-directional sound source in two multi-purpose halls which are taken as study objects. Objective and subjective experimental results show that the corresponding auralizaion qualities of sound sources with different directivities are obviously different in the aspects of subjective source distance,clarity and speech intelligibility. Further,it is pointed out that the use of omni-directional sound source as simulated source in the past many auralization studies is one of the most important causes of affecting auralization quality. Therefore,in aualization study,the sound source with the directivity similar to actual sound source′s directivity should be used.