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Last year, we presented the “spring - mass model” FEA simulation from stick-slip phenomenon standpoint for improvement of “creep groan”. “Creep groan” is one of representative groan of brake system for automobile and it is clarified by µ vs velocity (µ−V) property of friction material. This time, we will present our study for reduction of creep groan by pad shape parameter (chamfer and slot) with “advanced” spring - mass model” FEA simulation which used actual pad shape as mass model. In addition, this paper was revised based on oral presentation which we presented at SAE 2013.