In this paper, the difference of paralysis on hitting a baseball ball among various bats is examined by Scheffe's paired comparison that is one of sensory evaluation. To find the cause of the difference of paralysis, the grip acceleration of the bat on hitting a baseball ball is measured, the frequence of the acceleration is analysed by MEM and modal analysis is executed. Further by using sensitivity analysis, FRP bat which the paralysis is not low less than metal bat is produced.