The electrical-conductivity and magnetization behavior of single-phase Al 70− x B x Pd 20Mn 10 ( x = 0, 0.5, 1, 2 and 4) quasicrystals have been studied. It has been observed that boron substitution brings drastic changes in the σ– T behavior of Al–Pd–Mn quasicrystals. Even a 0.5 at.% replacement of aluminium by boron causes a drastic change in the σ– T behavior. The σ– T variation shows minima, which shifts rapidly towards high temperature with increasing boron concentration and goes even above the room temperature. Field cool and zero-field cool χ– T behavior shows the paramagnetic nature of the samples. The σ–(ln −1 T) plots show linear behavior and get scaled in a {( σ( T) − σ min)/( σ 4 − σ min)} vs (ln −1 T/ln −1 T min) plot. These samples show large magnetoresistance with +H 2 behavior. Occurrences of these features very strongly indicate the dominating role of Kondo-scattering in electronic transport of this Al–B–Pd–Mn and in general for Al–Pd–Mn quasicrystalline system. The observed σ( T) behavior has been accounted to the occurrence of Kondo-type spin-flip scattering in Al–B–Pd–Mn and Al–Pd–Mn quasicrystals in the presence of weak-localization.