In this research, Al composites reinforced with carbon nanotubes (CNTs) were fabricated by powder metallurgy. The produced samples were prepared from CNTs with 0, 0.5, 1, 1.5, 2, 2.5 and 5 wt.%. The milling process was performed by a planetary ball mill and the samples were compacted under a force of 10 tons for 1 minute. Prior to measurements, the samples were heated at 580 °C for half an hour. Also, electrical resistance, density and hardness of the samples were measured and the effect of sintering temperature on the samples with 1.5 wt.% of CNTs was investigated. The samples were heated at 480, 580, 700 and 1200 °C for half an hour and it was observed that the annealing temperature had a significant effect on the hardness increase of the samples. It was found that the annealing time did not have a significant effect on the hardness of the samples. Measurements showed that by increasing the wt.% of CNTs, the and density of the composite continuously decreased but the electrical resistance and hardness of the samples increased.