Abstract: The elastic cover of tactile sensors can decrease the spatial resolution of the tactile sensor due to its low pass spatial filtering characteristics. The fingerprint of human being seems theoretically to be able to partly solve this problem. In this paper, we analyze the characteristics of the fingerprint like elastic cover of robot tactile sensor. The result shows that the fingerprint like cover can effectively improve the high spatial frequency gain of elastic cover by carefully selecting the A, B, h¹, h² parameters of the fingerprints.