ALICE is one of four large experiments at the CERN Large Hadron Collider. Located 52 meters underground with 28 meters of overburden rock,it has also been used to detect atmospheric muons produced by cosmic ray interactions in the upper atmosphere. The muon charge ratio reflects the excess of pi+ over pi- and K+ over K- in the forward fragmentation region of proton initiated interactions together with the fact that there are more protons than neutrons in the primary spectrum. We present a measurement on the cosmic charge ratio with the data collected by ALICE during 2015. This analysis exploits the large size and excellent tracking capability of the ALICE Time Projection Chamber. For a momentum up to 200 GeV, our measurement is in good agreement with the expected value for this range for single muon tracks.